WordReference Random House Learner's Dictionary of American English © 2017
off /ɔf, ɑf/USA pronunciation   adv. 
  1. so as to be no longer supported or attached:This button is about to come off.
  2. so as to be no longer covering or enclosing:Pull the wrapping off.
  3. in a direction that is away from a place:to look off toward the west.
  4. away from a path, course, etc.:The road branches off to Grove City.
  5. so as to be away or on one's way:Let's start off early on our trip.
  6. away from what is considered normal, standard, or the like:He's always going off on some strange line of thinking.
  7. so as to go from one condition or state to another:drifted off to sleep.
  8. from a charge or price:took 10 percent off.
  9. at a distance in space or future time:Summer is only a week off.
  10. out of operation:Turn the lights off.
  11. into operation or action;
    on:The whistle goes off at noon.
  12. in absence from work, service, etc.:got a day off.
  13. completely;
    utterly:Finish off that last piece of meat.
  14. into effect:The contest went off as planned.
  15. so as to be divided or separated into parts:Mark off the paper into sections.

prep. 
  1. so as no longer to be supported by, resting on, etc.:Wipe the dirt off your shoes.
  2. deviating from:The ship is 50 miles off course.
  3. below the usual level or standard:This dress was marked 20 percent off.
  4. away or resting from:He's off duty on Tuesdays.
  5. abstaining from:off drugs.
  6. located apart from:a village off the main road.
  7. leading away from:an alley off 12th Street.
  8. Informal Termsfrom (a certain source):I bought this watch off a street vendor.
  9. by means of;
    using (someone or something) as the source:He was living off his parents.

adj. 
  1. in error;
    wrong:[be +  ~]You are off on that point.
  2. less than normal or sane:[be +  ~]Sometimes he's a little off, but he's harmless.
  3. not up to the usual or expected standard:[before a noun]The play has its off moments.
  4. affected by spoilage;
    bad:[be +  ~]The cream is a bit off.
  5. no longer in effect, in operation, or in process:[be +  ~]The deal is off.
  6. in a certain state, circumstance, etc.:[be +  ~]to be badly off for money.
  7. free from work or duty:He's off tomorrow.
  8. of less than the ordinary activity;
    slack:[before a noun]the off season at the beach.
  9. unlikely;
    remote:[before a noun]We stopped by on the off chance that we'd find her at home.
  10. starting on one's way;
    leaving:[be +  ~]I'm off to Europe on Monday.
  11. lower in price or value;
    down:[be +  ~]Stock prices were off this morning.

v. [+ object]
  1. Slang Termsto kill:They were ready to off the cops.
Idioms
  1. off and on: 
    • Idiomswith periods of time in between:to work off and on.Also, on and off. 
  2. Idioms, Pronounsoff of, off:Take your feet off of the table!
  3. Idiomsoff with, [+ with + object;  usually as a command]
    • Idiomstake away;
      remove:Off with those muddy boots!
    • Idiomscut off:Off with his head!


-off, suffix. 
  • -off is used to form nouns that name or refer to a competition or contest, esp. between finalists or to break a tie:cook + -off → cookoff (= a cooking contest);runoff (= a deciding final contest).

  • WordReference Random House Unabridged Dictionary of American English © 2017
    off  (ôf, of ),USA pronunciation adv. 
    1. so as to be no longer supported or attached:This button is about to come off.
    2. so as to be no longer covering or enclosing:to take a hat off; to take the wrapping off.
    3. away from a place:to run off; to look off toward the west.
    4. away from a path, course, etc.;
      aside:This road branches off to Grove City.
    5. so as to be away or on one's way:to start off early; to cast off.
    6. away from what is considered normal, regular, standard, or the like:to go off on a tangent.
    7. from a charge or price:He took 10 percent off for all cash purchases.
    8. at a distance in space or future time:to back off a few feet; Summer is only a week off.
    9. out of operation or effective existence:Turn the lights off.
    10. into operation or action:The alarm goes off at noon.
    11. so as to interrupt continuity or cause discontinuance:Negotiations have been broken off.
    12. in absence from work, service, a job, etc.:two days off at Christmas.
    13. completely;
      utterly:to kill off all the inhabitants.
    14. with prompt or ready performance:to dash a letter off.
    15. to fulfillment, or into execution or effect:The contest came off on the appointed day.
    16. into nonexistence or nothingness:My headache passed off soon.
    17. so as to be delineated, divided, or apportioned:Mark it off into equal parts.
    18. away from a state of consciousness:I must have dozed off.
    19. Nautical, Naval Termsaway from the land, a ship, the wind, etc.
    20. Idiomsget it off. See  get (def. 45).
    21. get off on. See  get (def. 49).
    22. off and on: 
      • IdiomsAlso,  on and off. with intervals between;
        intermittently:to work off and on.
      • Nauticalon alternate tacks.
    23. off with: 
      • Idiomstake away;
        remove:Off with those muddy boots before you step into this kitchen!
      • Idiomscut off:Off with his head!

    prep. 
    1. so as no longer to be supported by, attached to, on, resting on, or unified with:Take your feet off the table! Break a piece of bread off the loaf.
    2. deviating from:off balance; off course.
    3. below or less than the usual or expected level or standard:20 percent off the marked price; I was off my golf game.
    4. away, disengaged, or resting from:to be off duty on Tuesdays.
    5. [Informal.]refraining or abstaining from;
      denying oneself the pleasure, company, practice, etc., of:He's off gambling.
    6. away from;
      apart or distant from:a village off the main road.
    7. leading into or away from:an alley off 12th Street.
    8. not fixed on or directed toward, as the gaze, eyes, etc.:Their eyes weren't off the king for a moment.
    9. Informal Termsfrom (a specified source):I bought it off a street vendor.
    10. from or of, indicating material or component parts:to lunch off cheese and fruit.
    11. from or by such means or use of:living off an inheritance; living off his parents.
    12. Nautical, Naval Termsat some distance to seaward of:off Cape Hatteras.
    13. Idioms, Pronounsoff of, [Informal.]off:Take your feet off of the table!

    adj. 
    1. in error;
      wrong:You are off on that point.
    2. slightly abnormal or not quite sane:He is a little off, but he's really harmless.
    3. not up to standard;
      not so good or satisfactory as usual;
      inferior or subnormal:a good play full of off moments.
    4. no longer in effect, in operation, or in process:The agreement is off.
    5. stopped from flowing, as by the closing of a valve:The electricity is off.
    6. in a specified state, circumstance, etc.:to be badly off for money.
    7. (of time) free from work or duty;
      nonworking:a pastime for one's off hours.
    8. not working at one's usual occupation:We're off Wednesdays during the summer.
    9. of less than the ordinary activity, liveliness, or lively interest;
      slack:an off season in the tourist trade.
    10. unlikely;
      remote;
      doubtful:on the off chance that we'd find her at home.
    11. more distant;
      farther:the off side of a wall.
    12. (of a vehicle, single animal, or pair of animals hitched side by side) of, being, or pertaining to the right as seen from the rider's or driver's viewpoint (opposed to near):the off horse; the off side.
    13. starting on one's way;
      leaving:I'm off to Europe on Monday. They're off and running in the third race at Aqueduct.
    14. lower in price or value;
      down:Stock prices were off this morning.
    15. Nautical, Naval Termsnoting one of two like things that is the farther from the shore;
      seaward:the off side of the ship.
    16. Sport[Cricket.]noting or pertaining to that side of the wicket or of the field opposite that on which the batsman stands.

    n. 
    1. the state or fact of being off.
    2. Sport[Cricket.]the off side.

    v.i. 
    1. to go off or away;
      leave (used imperatively):Off, and don't come back!

    v.t. 
    1. Slang Termsto kill;
      slay.
    • origin, originally stressed variant of of1
      The phrasal preposition off of is old in English, going back to the 16th century. Although usage guides reject it as redundant, recommending off without of, the phrase is widespread in speech, including that of the educated:Let's watch as the presidential candidates come off of the rostrum and down into the audience.Off of is rare in edited writing except to give the flavor of speech.

    -off, 
  • a suffixal use of the adverb  off, forming nouns that denote competitions, esp. between the finalists of earlier competitions or as a means of deciding a tie:cookoff;playoff;runoff.

  • off., 
    1. offered.
    2. office.
    3. officer.
    4. official.


    Collins Concise English Dictionary © HarperCollins Publishers::

    off /ɒf/ prep
    1. used to indicate actions in which contact is absent or rendered absent, as between an object and a surface: to lift a cup off the table
    2. used to indicate the removal of something that is or has been appended to or in association with something else: to take the tax off potatoes
    3. out of alignment with: we are off course
    4. situated near to or leading away from: just off the High Street
    5. not inclined towards: I'm off work, I've gone off you
    adv
    1. (particle) so as to be deactivated or disengaged: turn off the radio
    2. (particle) so as to get rid of: sleep off a hangover
    3. so as to be removed from, esp as a reduction: he took ten per cent off
    4. spent away from work or other duties: take the afternoon off
    5. on a trip, journey, or race: I saw her off at the station
    6. (particle) so as to be completely absent, used up, or exhausted: this stuff kills off all vermin
    7. out from the shore or land: the ship stood off
    8. out of contact; at a distance: the ship was 10 miles off
    9. out of the present location: the girl ran off
    10. away in the future: August is less than a week off
    11. (particle) so as to be no longer taking place: the match has been rained off
    12. (particle) removed from contact with something, as clothing from the body: the girl took all her clothes off
    13. offstage: noises off
    14. off and on, on and offoccasionally; intermittently: he comes here off and on
    15. off with ⇒ (interjection) a command, often peremptory, or an exhortation to remove or cut off (something specified): off with his head, off with that coat, my dear
    adj
    1. not on; no longer operative: the off position on the dial
    2. (postpositive) not or no longer taking place; cancelled or postponed: the meeting is off
    3. in a specified condition regarding money, provisions, etc: well off, how are you off for bread?
    4. unsatisfactory or disappointing: his performance was rather off, an off year for good tennis
    5. (postpositive) in a condition as specified: I'd be better off without this job
    6. (postpositive) no longer on the menu; not being served at the moment: sorry, love, haddock is off
    7. (postpositive) (of food or drink) having gone bad, sour, etc: this milk is off
    n
    1. the part of the field on that side of the pitch to which the batsman presents his bat when taking strike: thus for a right-hander, off is on the right-hand side
    2. (in combination) a fielding position in this part of the field: mid-off
    3. (as modifier): the off stump
    Etymology: originally variant of of; fully distinguished from it in the 17th century
    USAGE
    In standard English, off is not followed by of: he stepped off (not off of) the platform




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