off
preposition
ɒf 
ɔːf ɑːf Help
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.
1 down or away from a place or at a distance in space or timeI fell off the ladder.Keep off the grass!an island off the coast of SpainThey were still 100 metres off the summit.Scientists are still a long way off finding a cure.We're getting right off the subject.2 leading away from something, for example a road or roomWe live off Main Street.There's a bathroom off the main bedroom.3 used to say that something has been removedYou need to take the top off the bottle first!I want about an inch off the back of my hair.4 away from work or dutyHe's had ten days off school.5 away from a priceThey knocked £500 off the car.6 off of (non-standard or North American English, informal) off; fromI got it off of my brother.7 not wanting or liking something that you usually eat or useI'm off (= not drinking) alcohol for a week.He's finally off drugs (= he no longer takes them).