interjection
'Would you have dinner with me?' 'OK!' 'I think you ought to leave.' 'OK!'
!
adjective
Is it OK if I go the cinema tonight? That dress is OK to wear to the dance
The film was OK, I suppose
Now that he's on the proper medication, Sam is OK. The mechanic assured me that my car would be OK
verb
A department head must OK your expense account before you can be reimbursed
noun
You need an OK from the security guard to enter the restricted area
adverb
She can get along OK without me
US