off

adjective19

1. •
   [after a verb] (of a machine or a light) not working or not switched on

   • All the lights are off.
2. •
   Temporarily not attending a usual place, such as work or school, especially owing to illness or holiday.

   • John's off today. He's back on Wednesday.
3. •
   Designating a time when one is not strictly attentive to business or affairs, or is absent from a post, and, hence, a time when affairs are not urgent.

   • He took an off day for fishing.
4. •
   [after a verb] Cancelled; not happening.

   • The party's off because the hostess is sick.
5. •
   Denoting something faulty, unsatisfactory, objectionable etc.
6. •
   Not correct; not properly formed; not logical, harmonious, etc.

   • This calculation is off: the numbers don't add up.
   • Is it right to say 'the amount of cars'? It sounds off to me.
7. •
   [after a verb] Inappropriate; untoward.

   • I felt that his comments were a bit off.
8. •
   (Australia, slang) Disgusting, repulsive, abhorrent.
9. •
   Circumstanced.

   • Our family used to be well off; now we're very badly off.
   • How are you off for milk? Shall I get you some more from the shop?
10. •
    (UK) Rancid, rotten, gone bad.

    • This milk is off!
11. •
    Started on the way.

    • And they're off! Whatsmyname takes an early lead, with Remember The Mane behind by a nose.
12. •
    Less than normal, in temperament or in result.

    • sales are off this quarter
13. •
    Designating a time when one is not performing to the best of one's abilities.
14. •
    Not fitted; not being worn.

    • Your feet will feel better once those tight boots are off.
    • The drink spilled out of the bottle because the top was off.
15. •
    [after a verb] Presently unavailable. (of a dish on a menu)

    • I'll have the chicken please. — Sorry, chicken's off today.
16. •
    Far; off to the side.

    • He took me down the corridor and into an off room.
17. •
    (UK) On the side furthest from the kerb (the right-hand side if one drives on the left).

    • The off front wheel came loose.
18. •
    In, or towards the half of the field away from the batsman's legs; the right side for a right-handed batsman.
19. •
    (slang) Offsuit.

preposition13

1. •
   Not positioned upon; away from a position upon.

   • He's off the roof now.
   • I took it off the table.
2. •
   Detached, separated, excluded or disconnected from; away from a position of attachment or connection to.

   • The phone is off the hook
   • The coat fell off the peg.
3. •
   Used to indicate the location or direction of one thing relative to another, implying adjacency or accessibility via.

   • His office is off this corridor on the right.
   • We're just off the main road.
4. •
   Used to express location at sea relative to land or mainland.

   • The island is 23 miles off the cape.
5. •
   Removed or subtracted from.

   • There's 20% off the list price.
6. •
   Temporarily not attending (a usual place), especially owing to illness or holiday.
7. •
   Outside the area or region of.

   • The suspect is now believed to be off the campus.
   • I couldn't see what it said because the line of text ran off the page.
8. •
   (informal) Out of the possession of.

   • He didn't buy it off him. He stole it off him.
9. •
   No longer wanting or taking.

   • He's been off his feed since Tuesday.
   • He's off his meds again.
10. •
    (slang) Under the influence of.

    • The guy was off a perc.
11. •
    (informal) As a result of; resulting from the actions of.

    • The team won off a late-game fumble by an opposing player.
    • The economy is rising off the strength of the tech sector.
12. •
    Used to indicate separation from a natural home or origin.

    • He used to be gone a lot of the time, off working on an oil rig.
13. •
    Placed after a number (of products or parts, as if a unit), in commerce or engineering.

    • I'd like to re-order those printer cartridges, let's say 5-off.
    • samples submitted … 12 off Thermistors type 1K3A531 … — BSI test report for shock and vibration testing, 2000

adverb6

1. •
   In a direction away from the speaker or other reference point.

   • He drove off in a cloud of smoke.
2. •
   Into a state of non-operation or non-existence.

   • Please switch off the light when you leave.
   • The dinosaurs died off long ago.
3. •
   So as to remove or separate, or be removed or separated.

   • He bit off the end of the carrot.
   • Some branches were sawn off.
4. •
   Used in various other ways specific to individual idiomatic phrases, e.g. bring off, show off, put off, tell off, etc. See the entry for the individual phrase.
5. •
   Offstage.
6. •
   Specifying the number of some item in bills, parts lists, etc.

   • 3 off 20 amp fuses

verb2

1. •
   (slang) To kill.
2. •
   (Philippines, Singapore) To switch off.

   • Can you off the light?

noun1

1. •
   Beginning; starting point.

   • He has been very obviously an untrustworthy narrator right from the off.

noun4

1. •
   Office.
2. •
   Officer.
3. •
   Abbreviation of offence.
4. •
   Abbreviation of offender.