Definition of off preposition from the Oxford Advanced American Dictionary

     

    off

     preposition
    preposition
    NAmE//ɔf//
     
    , NAmE//ɑf//
     
     
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  1. 1 For the special uses of off in phrasal verbs, look at the entries for the verbs. For example, take something off something is in the phrasal verb section at take. down or away from a place or at a distance in space or time I fell off the ladder. Keep off the grass! an island off the coast of Maine They were still 100 meters off the summit. We're getting right off the subject.
  2. 2leading away from something, for example a road or room We live off Main Street. There's a bathroom off the main bedroom.
  3. 3used to say that something has been removed You need to take the top off the bottle first! I want about an inch off the back of my hair.
  4. 4away from work or duty He's had ten days off school.
  5. 5 away from a price They knocked $500 off the car.
  6. 6 off of (informal) off; from Scientists are still a long way off of finding a cure. I got it off of my brother.
  7. 7not wanting or liking something that you usually eat or use I'm off (= not drinking) alcohol for a week. He's finally off drugs (= he no longer takes them).
See the Oxford Advanced Learner's Dictionary entry: off