From Longman Dictionary of Contemporary Englishldoce_759_zOKOK1, okay /ˌəʊ ˈkeɪ $ ˌoʊ-/ ●●●S1 interjection1YESused to show that you agree with something or give permission for someone to do something‘Can I take the car today?’ ‘Okay.’OK, if that’s what you prefer.2used to ask someone if they agree with you or will give permission for you to do somethingI’ll see you at seven, OK?3START TO HAPPEN, EXIST ETCCONTINUE/START AGAINused when you start talking about something new, or when you pause before continuingOK, let’s move on to the next point.Okay, any questions so far?4STOP something THAT IS HAPPENINGused to tell someone to stop arguing with you or criticizing youOK, OK, so I made a mistake.Look, I’m doing my best, okay?
Examples from the Corpus
OK• Just don't tell anyone, OK?• Look, I just can't walk any faster, OK?• OK, let's begin chapter six.• OK, now add the milk and eggs and then mix.OKOK2, okay ●●●S1 adjective, adverb spoken1[not before noun]GOOD ENOUGH if you are OK, you are not ill, injured, or unhappy syn all rightAre you OK?Do you feel OK now?Mum’s doing OK now.2ACCEPT[not before noun] something that is OK is acceptable and will not cause any problems syn all rightWill half past eight be OK?Does my hair look OK?that’s/it’s OK‘Sorry I’m late.’ ‘That’s OK.’Is it OK if I leave my bags here?Yeah, the TV's working OK.it is okay (for somebody) to do somethingIt’s okay for you to go home now.it is okay with/by somebodyI’ll pay you the rest tomorrow, if that’s OK with you.RegisterPeople usually avoid OK or okay in writing, and use more formal words such as acceptable or satisfactory: We have to make sure that the quality is acceptable.3[not before noun]GOOD/EXCELLENTsatisfactory but not extremely good‘How was the film?’ ‘It was okay, but not brilliant.’I think I did okay in the exam.4someone who is OK is nice, pleasant etcI’ve met Jim once, and he seems OK.He’s an OK guy.
Examples from the Corpus
OK• "I couldn't find the shampoo you wanted." "That's okay."• Are you OK?• Is your stomachOK?• The movie was OK, but the book was better.• Are these clothesOK for the opera?• an OKkind of guy• I figure that 110 pounds is an OKweight for me to be.• Dwight's OK. You can trust him.doing OK• Newsome had a bad start but ended up doing ok, I thought.it is okay with/by somebody• It's OK with me if we just stay home tonight.OKOK3, okay verb (past tense and past participle OK’d, present participle OK'ing, third person singular OK’s or okayed, okaying, okays) [transitive] informalAGREELET/ALLOWto say officially that you will agree to something or allow it to happenThe plans have been okayed, so let’s get started as soon as possible.→ See Verb table