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On which means in English. Prepositions on and off in different meanings. Translation and meaning of OFF in English and Russian

More meanings of this word and English-Russian, Russian-English translations for the word "ON-OFF" in dictionaries.

  • ON OFF - in operation / not in operation (of a button which activates or deactivates an electrical appliance)
    Explanatory Dictionary of the English Language - Editorial bed
  • ON-OFF — on-off BrE AmE ˌɒn ˈɒf ◂ -ˈɔːf ◂ AmE \ ˌɑːn ˈɔːf ◂ ˌɔːn-, -ˈɑːf ◂
    Longman Pronunciation English Dictionary
  • ON-OFF — adjective [ only before noun ] 1. (of a switch) having the positions "on" and "off" : an …
  • ON-OFF - ˌon-ˈoff BrE AmE adjective 1 . sometimes happening and not at other times: an on-off relationship She …
  • ON-OFF — adjective COLLOCATIONS FROM OTHER ENTRIES an on-off relationship (= happening sometimes and not at other times) ▪ Their on-off …
  • ON-OFF-adj.
    Oxford Collocations Dictionary Second Edition
  • ON-OFF-adj. On-off is used with these nouns: switch
    Oxford Collocations English Dictionary
  • ON OFF - on off
  • ON-OFF (technical) two-position
    Big English-Russian Dictionary
  • ON-OFF
  • ON-OFF - on-off, two-position - on-off action - on-off control - on-off keying - on-off modulation - on-off switch
  • ON OFF - (a) on/off
    English-Russian Linguistica"98 dictionary
  • ON-OFF - a tech. on/off (about switch, etc.)
    New large English-Russian dictionary - Apresyan, Mednikova
  • ON/OFF
    English-Russian Dictionary of Mechanical Engineering and Automation 2
  • ON / OFF - "on - off" (on a device with two fixing positions)
    English-Russian dictionary of mechanical engineering and industrial automation
  • ON-OFF - (working) on ​​the principle of "on - off", relay
    English-Russian dictionary on computers
  • ON-OFF - (working) on ​​the principle of "on - off", relay
    English-Russian Dictionary of Computing and Programming
  • ON-OFF - (working) on ​​the principle of "on - off", relay
    English-Russian dictionary of computer terms
  • ON-OFF - relay, two-position
    English-Russian Dictionary of Telecommunications
  • ON / OFF - two-position
    Modern English-Russian dictionary of mechanical engineering and production automation
  • ON-OFF - two-position adj on / off
    English-Russian WinCept Glass dictionary
  • ON-OFF
  • ON OFF - on off
    New large English-Russian dictionary

  • Longman DOCE5 Extras English vocabulary
  • OFF
    Longman DOCE5 Extras English vocabulary
  • — I. (|)ȯn, (|)än, in the southeastern US sometimes (|)ōn preposition Etymology: Middle English, preposition & adverb, fr Old English an, …
  • OFF
    Webster's New International English Dictionary
  • OFF - /awf, of/ , adv. 1. so as to be no longer supported or attached: This button is about to come …
    Random House Webster's Unabridged English Dictionary
  • OFF - I. ˈȯf adverb Etymology: Middle English of, from Old English - more at of Date: before 12th century 1. a. …
    Merriam-Webster's Collegiate English vocabulary
  • OFF - adv denoting opposition or negation. 2. off interj away; begone; a command to depart. 3. off adv in a …
    Webster English vocab
  • OFF - / ɒf; NAmE ɔːf; ɑːf/ adverb , preposition , adjective , noun , verb ■ adverb HELP NOTE: For …
    Oxford Advanced Learner's English Dictionary
  • — I. on 1 S1 W1 /ɒn $ ɑːn, ɒːn/ BrE AmE preposition [Language: Old English] 1 . ON...
    Longman Dictionary of Contemporary English
  • OFF - I. off 1 S1 W1 /ɒf $ ɒːf/ BrE AmE adverb, preposition, adjective 1. away from a …
    Longman Dictionary of Contemporary English
  • OFF - adv., prep., adj., & n. --adv. 1 away; at or to a distance (drove off; is three miles off). 2…
    English basic colloquial vocabulary
  • OFF - adv., prep., adj., & n. adv. 1 away; at or to a distance (drove off; is three miles off). 2…
    Concise Oxford English Dictionary
  • OFF - adv., prep., adj., & n. --adv. 1. away; at or to a distance (drove off; is three miles off). 2…
    Oxford English vocab
  • - The preposition is pronounced /ɒn/. The adverb and the adjective are pronounced /ɒn/. Frequency: The word is one of the …
  • OFF - The preposition is pronounced /ɒf, AM ɔ:f/. The adverb is pronounced /ɒf, AM ɔ:f/ Frequency: The word is one of …
    Collins COBUILD Advanced Learner's English Dictionary
  • OFF-adj. sup off sup off or up back off blow off bring off buck off bug off bump off burn …
    Collegiate Thesaurus English vocab
  • - 1. proposition. 1) a) in the spatial sense indicates the presence on the surface of some sl. subject, on smth. on a house on …
    Big English-Russian Dictionary
  • OFF - 1. adv. 1) indicates distance, distance from smth. He had to be off. - He needed to leave. to...
    Big English-Russian Dictionary
  • - on.ogg 1. ɒn a 1. near, inner the on side - closer (to the interlocutor, viewer, etc. ...
    English-Russian-English Dictionary of General Vocabulary - Collection of the best dictionaries
  • OFF
    English-Russian-English Dictionary of General Vocabulary - Collection of the best dictionaries
  • OFF - 1) secondary 2) off 3) distant 4) farther away 5) insignificant 6) low-grade 7) disconnected 8) free. cast off the mooring rope - give the mooring line cut off a ...
    English-Russian Scientific and Technical Dictionary
  • - 1. ɒn a 1. near, inner the on side - closer (to the interlocutor, viewer, etc.) ...
  • OFF - 1. ɒf n 1. off position (for appliances, switches, etc.) to be set at off - ...
    Big new English-Russian dictionary
  • OFF - 1. adv. 1) indicates distance, distance from smth. He had to be off. “He needed to leave. to...
    English-Russian Dictionary of General Vocabulary
  • OFF - 1. adv. 1) indicates distance, distance from smth. He had to be off. “He needed to leave. to march off — …
    English-Russian Dictionary of General Vocabulary
off
1. [ɒf] n 1. off position ( at appliances, switches, etc.)
to be set at ~ - be in the "off" position
2. free time
in one's ~ - in free time
3. sport. the part of the field to the left of the bowler ( cricket)
4. unfold start, start
ready for the ~ - ready to start
from the ~ - from the very beginning
2. [ɒf] a 1. more distant, distant
2. 1) located on the right side, on the right
the ~ horse - right hand
the ~ side of the road - the right side of the road
the ~ wheel of a cart - the right wheel of a cart
2) sea facing the sea about the ship)
3) sport. located to the left of the bowler ( about part of the field - cricket)
3. minor, less important, insignificant
~ street - lane; street
~ issue - minor issue
4. free, unoccupied
day ~, ~ day - free day; non-working day [ cf. tzh. 5, 1)]
~ time - free time
a pastime for one‘s ~ hours - entertainment / activities / during leisure hours / leisure /
we are ~ (on) Wednesdays during the summer
we get two days ~ at Christmas - we have two days off for Christmas
5. 1) unsuccessful, unfavorable
~ day - bad day [ cf. tzh. 4]
~ season - off season
2) not quite healthy
he is feeling rather ~ today - today he does not feel well
3) stale ( about food)
the meat looks a bit ~ - the meat does not look very good
the fish is ~ - the fish has gone bad
4) low-grade, poor quality; below the (usual) standard
~ grade - low quality
~ year - a) lean year; b) a year with low business activity
6. erroneous, wrong
you are ~ on that point - here you are wrong
your figures are way ~ - your calculations are completely wrong
3. [ɒf] adv points to
1. completion of action
1) movement away, to the side, etc. - transmitted by verb prefixes from-, u-, you-, s- and etc.
to drive ~ - leave; drive off
to walk ~ - to leave
to go ~ on a journey - go on a journey
the children ran ~ - the children ran away
he pushed me ~ - he pushed me away
he sent the parcel ~ - he sent the parcel
when does the plane take ~? - When does the plane take off?
he turned ~ into a side street - he turned into an alley
2) movement from top to bottom - transmitted by verb prefixes with-, co-
to fall ~ - fall down
to jump ~ - jump
to slip ~ - slip off
3) separation of a part from the whole - transmitted by verb prefixes from-, from-
to break ~ - break off
to shake ~ - shake off
to bite ~ a piece - bite off a piece
cut the end ~ - cut / trim / tip
one of the wheels flew ~ - one wheel jumped off
the handle came ~ - the handle [button] came off
mark it ~ into three equal parts - measure so that you get three equal parts
4) removing a piece of clothing, etc.:
he took his coat ~ - he took off his coat [glasses]
hats~! - hats off!
with his shoes ~ - without shoes, barefoot
5) bringing an action to an end:
to drink ~ - drink (to the bottom)
to pay ~ one‘s debt - pay off the entire debt
to kill ~ the animals - exterminate animals
2. distance
1) about the distance:
a long way ~, far ~ - far
a little way ~ - not far, close
the town is five miles ~ - the city is five miles away
~ in the distance he saw a light - far ahead he saw a light
2) in time:
the vacation is not far ~ - not long before the holidays
June is three months ~ - there are three more months until June
my holiday is a week ~ - my vacation is in a week
3. 1) (sudden)termination:
to break ~ work - interrupt work
to cur ~ supplies - stop supply /supply/
to break ~ with smb. - to break / end a relationship / with smb.
he broke ~ in the middle of the sentence - in the middle of a sentence, he suddenly stopped
2) cancellation, annulment, etc.:
the deal is ~ - the deal is canceled
the concert is ~ - the concert is canceled
4. 1) reduction or reduction:
the number of visitors dropped ~ - the number of visitors dropped
the profits fell ~ - profits fell
2) subsidence or weakening:
the pain passed ~ - the pain subsided
3) deliverance, liberation from:
to marry /to get/ one‘s daughters ~ - marry off daughters
4) turning off the device or mechanism:
to turn /to switch, to put/ ~ - turn off
switch ~ the light - turn off the light
he turned ~ the radio - he turned off the radio
he shut ~ the engine - he turned off the engine
5. security:
he lives comfortably ~ - he is a wealthy / rich / person
he earns well ~ - he earns well; he has enough money
6. in combinations:
to be~- unfold a) to leave, leave; I must be ~ - I must go / leave /; we are ~ now - well, we went / set off /; b) to be absent; to be ~ sick - absent due to illness; he‘s ~ on Tuesdays - it does not happen on Tuesdays; she‘s been ~ for a week - she was gone for a whole week; c) not enough not enough; there are two buttons ~ - missing two buttons; I‘m sorry the lamb is ~ - unfortunately, there is no more lamb / lamb is over /; d) fail, break down; the TV set is ~ - TV [radio and so on.] does not work; d) to be like secured [ cf. tzh. 5]
to be well ~ for smth. - to be well [poorly] provided with smth.
you must be badly ~ for books - you seem to have not enough books
he is badly /poorly/ ~ - he needs, he is poor
hands~! - hands off!
he is neither ~ nor on - he does not say yes or no; he hesitates
be ~!, ~ you go! - get out!, get out!; go away!
~ with you! - get out of here!
~ with his head! - Cut off his head!
~ with the old and on with the new! Down with the old, long live the new!
keep ~! - a) be careful!, beware!; b) do not fit!
to see smb. ~ - see someone off
to sleep smth. ~ - after sleeping, get rid / recover / from smth.
to sleep ~ a bad headache - cure a severe headache with sleep
he took himself ~ - he went
see other combinations under the corresponding words
4. [ɒf] v open 1. 1) stop ( negotiations, etc.)
2) back down
2. Amer. sl. kill, kill; "eliminate", "remove"
3. sea rare move away from the coast, go to the open sea
5. [ɒf] prep points to
1. 1) removal or separation from smth. With
to take the pan ~ the stove - remove the pan from the stove
to fall ~ the ladder - fall down the stairs [from the horse]
get ~ the table - leave the table
there‘s a button ~ your dress - a button came off on your dress
he got the matter ~ his hands - he got rid of this case
he is ~ the beaten track - he did not follow the beaten track
keep ~ the grass - do not walk on the grass! ( inscription)
2) an offshoot from:
a street ~ Fifth Avenue - the street running from Fifth Avenue
2. being on some(usually close)distance from smth. from
a street ~ the square - the street that goes to the square
ten miles ~ the island - ten miles from the island
the ship sank ~ the coast - the ship sank near the coast
3. reduction, discount less, lower
at 10% ~ the regular price - 10% off the regular price
4. unfoldsource from, at
to borrow smth. ~ smb. - borrow [buy] smth. from someone
5. 1) food, material, substance - the creation is often transmitted. case:
to dine ~ roast beef - have lunch with roast beef
they lunched ~ sandwiches - they had sandwiches for breakfast
2) source of livelihood or income:
they lived ~ tourists - they lived off income from tourists
6. deviation from the norm:
~ the mark - a) off target ( about the shot); b) irrelevant
~ one‘s balance - unbalanced
he's ~ his head - unfold he's crazy
he is ~ his feed - unfold he has no appetite
he‘s ~ drug now - he no longer takes drugs
7. non-participation in smth.; unwillingness to participate in smth., to do smth.
~ duty - not on duty
he‘s gone ~ science fiction - he fell out of love with science fiction
I‘m ~ smoking - I don’t smoke anymore
~ the map - non-existent, disappeared
it is ~ the question - this is out of the question
~the wind- sea with a tailwind, heading backstay
6. [ɒf] int 1) attention!; stop!
2) away!; Down with!

See more words in "

off free (about time, hours); an off day off, a free day off distant, more remote; an off road an off street that is an off issue to be badly off to be comfortably off making good money; to be well provided for off indicates termination, interruption, expiration, annulment, cancellation: to break off negotiations to cut off supplies cut off supplies; the strike is off the concert is off the cover is off the gilt is off; trans. frustrated to cut off supplies cut off supplies; the strike is off the concert is off the concert is off off indicates absence, impossibility of receiving: the dish is off this dish is no longer available (although it is listed on the menu) they pushed me off my seat they pushed me out of my seat; to fall off a ladder (tree, horse) to polish off; to finish off stale; the fish is a bit off off indicates distance: a long way off; five miles off for five miles; five miles the cover is off the gilt is off; trans. frustrated off indicates the removal of a piece of clothing: take off your coat! take off your coat!; hats off! hats off! off prep indicates: non-participation (in smth.): he is off gambling he does not gamble; off the cuff without preparation off one "s food without appetite; he is off smoking he quit smoking off not quite healthy; I am feeling rather off today I don't feel well today off indicates removal, separation: I must be off I must go ; off you go!, be off!, get off!, off with you! get out!; go away! off free time; in one "s off at leisure off indicates the distance: a long way off away; five miles off for five miles; five miles off prep indicates distance from; a mile off the road to keep off keep aloof; my hat is off prep indicates: non-participation (in smth.): he is off gambling off the cuff without preparation off indicates: turning off, disconnecting (some) apparatus or mechanism: to switch off the light turn off the light off secondary; an off street that is an off issue off far, more remote; an off road indicates the completion of the action: to pay off to pay (until the end); to drink off to drink (to the bottom) off indicates deliverance: throw to off reserve to be bolder, to take courage off improbable; on the off chance just in case off sport. located, located to the left of the bowler (about part of the cricket field) off not quite healthy; I am feeling rather off today the fish is a bit off dead (of the season) off low-grade; off grade low quality off prep indicates a deviation from the norm, the usual state: off one "s balance lost balance (also trans.) off indicates the absence, impossibility of obtaining: the dish is off this dish is no longer there (although it is listed on the menu ) off right; the off hind leg back right leg; the off side right side; sea side of the ship facing the open sea to break off negotiations off int away! off the road a mile from the road off free time; in one "s off at leisure off free (about time, hours); an off day off indicates freedom from work: to take time off to take a break from work off indicates the removal of a piece of clothing: take off your coat! take off your coat!; hats off! hats off! off removed, separated; the wheel is off off indicates removal, separation: I must be off I must go; off you go!, be off!, get off!, off with you! get out!; go away! off prep indicates removal from surface c; take you hands off the table take your hands off the table off sport. part of the field located to the left of the bowler (in cricket) off low grade; off grade low quality off right; the off hind leg the off side right side; sea side of a ship facing the open sea off to off it open leave, wash off off prep indicates a deviation from the norm, the usual state: off one "s balance lost balance (also trans.) off one" s food without appetite; he is off smoking off right; the off hind leg the off side right side; sea side of a ship facing the open sea off side sport. (position) off the beaten track off the main road; trans. in little-known areas; off the coast off the coast off prep indicates: non-participation (in smth.): he is off gambling he does not gamble; off the cuff without preparation off the mark off the target (about a shot) off the mark irrelevant off the point far from the target off the point irrelevant point: to carry one "s off to defend one's position; achieve one's own; to gain one "s point to reach the goal; off the point inopportunely off indicates removal, separation: I must be off I must leave; off you go!, be off!, get off!, off with you! get out!; go away! off indicates removal, separation: I must be off I must go; off you go!, be off!, get off!, off with you! get out!; go away! off unlikely; on the off chance just in case, off indicates the completion of the action: to pay off to pay (until the end); to drink off to drink (to the bottom) pay: off off pay off debt off off pay off off off pay off, take revenge off off pay off off off pay in full; settle accounts (with someone); cover (debt); pay off; to pay off handsomely bring in hefty profits; dismiss (workers) off off pay off off off decommission the crew from the ship off off dismiss off off sea. evade, roll away under the wind to polish off polish; to finish off polish: off off colloquial. get rid of (a competitor, etc.) off off dec. do away with, quickly deal with (smth.); to polish off a bottle of sherry the radio was off the whole day the radio wasn't on all day they are off they went; to run off run: off off don't impress; the scoldings run off him like water off a duck "s back they scold him, and everything is like water off a goose off off to be distracted from the subject (conversation) off off to drain; drain (water) off off decide the outcome of the race off off scribble poetry; glibly recite off off run away, run away (with - from) the street off the Strand to: turning off, disconnecting (something) apparatus or mechanism: to switch off the light off indicates the removal of a piece of clothing: take off your coat! take off your coat!; hats off! hats off! off indicates freedom from work: to take time off off prep indicates removal from surface c; take you hands off the table off secondary; an off street that is an off issue they are off to run off they pushed me off my seat; to fall off a ladder (tree, horse) off indicates deliverance: to throw off reserve be bold, take courage trade off sell, exchange trade: off off change one indicator at the expense of another off off exchange; trade(up)on profit, use for personal purposes off off exchange off off trade off off sell off withdrawn, separated; the wheel is off

off free (about time, hours); an off day off, a free day off distant, more remote; an off road an off street that is an off issue to be badly off to be comfortably off making good money; to be well provided for off indicates termination, interruption, expiration, annulment, cancellation: to break off negotiations to cut off supplies cut off supplies; the strike is off the concert is off the cover is off the gilt is off; trans. frustrated to cut off supplies cut off supplies; the strike is off the concert is off the concert is off off indicates absence, impossibility of receiving: the dish is off this dish is no longer available (although it is listed on the menu) they pushed me off my seat they pushed me out of my seat; to fall off a ladder (tree, horse) to polish off; to finish off stale; the fish is a bit off off indicates distance: a long way off; five miles off for five miles; five miles the cover is off the gilt is off; trans. frustrated off indicates the removal of a piece of clothing: take off your coat! take off your coat!; hats off! hats off! off prep indicates: non-participation (in smth.): he is off gambling he does not gamble; off the cuff without preparation off one "s food without appetite; he is off smoking he quit smoking off not quite healthy; I am feeling rather off today I don't feel well today off indicates removal, separation: I must be off I must go ; off you go!, be off!, get off!, off with you! get out!; go away! off free time; in one "s off at leisure off indicates the distance: a long way off away; five miles off for five miles; five miles off prep indicates distance from; a mile off the road to keep off keep aloof; my hat is off prep indicates: non-participation (in smth.): he is off gambling off the cuff without preparation off indicates: turning off, disconnecting (some) apparatus or mechanism: to switch off the light turn off the light off secondary; an off street that is an off issue off far, more remote; an off road indicates the completion of the action: to pay off to pay (until the end); to drink off to drink (to the bottom) off indicates deliverance: throw to off reserve to be bolder, to take courage off improbable; on the off chance just in case off sport. located, located to the left of the bowler (about part of the cricket field) off not quite healthy; I am feeling rather off today the fish is a bit off dead (of the season) off low-grade; off grade low quality off prep indicates a deviation from the norm, the usual state: off one "s balance lost balance (also trans.) off indicates the absence, impossibility of obtaining: the dish is off this dish is no longer there (although it is listed on the menu ) off right; the off hind leg back right leg; the off side right side; sea side of the ship facing the open sea to break off negotiations off int away! off the road a mile from the road off free time; in one "s off at leisure off free (about time, hours); an off day off indicates freedom from work: to take time off to take a break from work off indicates the removal of a piece of clothing: take off your coat! take off your coat!; hats off! hats off! off removed, separated; the wheel is off off indicates removal, separation: I must be off I must go; off you go!, be off!, get off!, off with you! get out!; go away! off prep indicates removal from surface c; take you hands off the table take your hands off the table off sport. part of the field located to the left of the bowler (in cricket) off low grade; off grade low quality off right; the off hind leg the off side right side; sea side of a ship facing the open sea off to off it open leave, wash off off prep indicates a deviation from the norm, the usual state: off one "s balance lost balance (also trans.) off one" s food without appetite; he is off smoking off right; the off hind leg the off side right side; sea side of a ship facing the open sea off side sport. (position) off the beaten track off the main road; trans. in little-known areas; off the coast off the coast off prep indicates: non-participation (in smth.): he is off gambling he does not gamble; off the cuff without preparation off the mark off the target (about a shot) off the mark irrelevant off the point far from the target off the point irrelevant point: to carry one "s off to defend one's position; achieve one's own; to gain one "s point to reach the goal; off the point inopportunely off indicates removal, separation: I must be off I must leave; off you go!, be off!, get off!, off with you! get out!; go away! off indicates removal, separation: I must be off I must go; off you go!, be off!, get off!, off with you! get out!; go away! off unlikely; on the off chance just in case, off indicates the completion of the action: to pay off to pay (until the end); to drink off to drink (to the bottom) pay: off off pay off debt off off pay off off off pay off, take revenge off off pay off off off pay in full; settle accounts (with someone); cover (debt); pay off; to pay off handsomely bring in hefty profits; dismiss (workers) off off pay off off off decommission the crew from the ship off off dismiss off off sea. evade, roll away under the wind to polish off polish; to finish off polish: off off colloquial. get rid of (a competitor, etc.) off off dec. do away with, quickly deal with (smth.); to polish off a bottle of sherry the radio was off the whole day the radio wasn't on all day they are off they went; to run off run: off off don't impress; the scoldings run off him like water off a duck "s back they scold him, and everything is like water off a goose off off to be distracted from the subject (conversation) off off to drain; drain (water) off off decide the outcome of the race off off scribble poetry; glibly recite off off run away, run away (with - from) the street off the Strand to: turning off, disconnecting (something) apparatus or mechanism: to switch off the light off indicates the removal of a piece of clothing: take off your coat! take off your coat!; hats off! hats off! off indicates freedom from work: to take time off off prep indicates removal from surface c; take you hands off the table off secondary; an off street that is an off issue they are off to run off they pushed me off my seat; to fall off a ladder (tree, horse) off indicates deliverance: to throw off reserve be bold, take courage trade off sell, exchange trade: off off change one indicator at the expense of another off off exchange; trade(up)on profit, use for personal purposes off off exchange off off trade off off sell off withdrawn, separated; the wheel is off

In // 1 Comment

One of the fascinating - and sometimes challenging - aspects of the English language is how the same words can have several different meanings. We will consider the use of two prepositions - “ on" And " off” - in different meanings.

ON

Let's first consider the use of " on”.

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I will see you on Tuesday - see you on Tuesday
In this sentence, the preposition “on” is used to indicate the exact day that something will happen.

The party is still on ! - the party is still going on
And in this sentence, “on” means that something will happen and continue according to plan.

The ball was on target for the goal! – the exact hit of the ball into the goal!
Here the word “on” means “right or right direction”.

Are you still on for the match tomorrow? - Have you changed your mind about going to tomorrow's match?
In this sentence, "on" is used to mean "are you still interested in doing something or going somewhere"

I left the light on ! - I left the light on
In this sentence, “on” means that some electrical device, such as a TV, radio, or a light, is on.

OFF

Now let's look at the word off". Here are some examples of its use.

I'm off work next Monday - I don't work next Monday
The word "off" means "no need to do something"

I'm off on my holiday soon! - I'm going on vacation soon!
And here “off” simply means “leave”.

I'm off my food at the moment - now I should not eat
In this case, “off” means “not being able to do something”, or “should avoid something”.

“Pooh! This milk is off!” - ugh! this milk is sour!
In this case, the word "off" simply means "inedible". It cannot be eaten or drunk. This food is rotten, rotten, sour.

Please turn off the light! – please turn off the light!
In this sentence, the word “off” means “disconnect”, or turn off the power supply to the appliance, or turn off the light bulb.

So, looking at simple words, you can find out how they can change the meaning of a sentence and be used in a variety of cases.