Oxford Advanced American Dictionary

Definition of off adjective from the Oxford Advanced Learner's Dictionary

off

adjective
off pronunciation English ɒf off pronunciation American ɔːf off pronunciation American ɑːf
 
[not before noun]1 (of food) no longer fresh enough to eat or drinkThis fish has gone off.The milk smells off.It's off.2 off (with somebody) (informal, especially British English) not polite or friendlyHe was a bit off with me this morning.3 (informal, especially British English) not acceptableIt's a bit off expecting us to work on Sunday.