interj. 1 O.K.!, Okay!, Fine!, Yes!, Definitely!, Agreed!, Very well!, All right! 'Would you have dinner with me?' 'OK!' 'I think you ought to leave ' 'OK!'
adj. 2 satisfactory, acceptable, correct, suitable, all right, fine, good, in order Is it OK if I go the cinema tonight? That dress is OK to wear to the dance 3 adequate, mediocre, fair, middling, passable, tolerable, Colloq so so, pretty good, not bad, not great The film was OK, I suppose 4 well, healthy; sound, in good condition, in fine fettle, fine, all right Now that he's on the proper medication, Sam is OK The mechanic assured me that my car would be OK.
v. 5 approve, sanction, ratify, authorize, endorse, support, agree to, allow, consent to, agree to, Colloq give the go-ahead or green light to, give the thumbs up or the nod to, rubber-stamp A department head must OK your expense account before you can be reimbursed
n. 6 approval, sanction, ratification, authorization, endorsement, agreement, support, permission, consent You need an OK from the security guard to enter the restricted area
adv. 7 all right, satisfactorily, well (enough), adequately She can get along OK without me