OK

I UK [ˌəʊˈkeɪ] / US [oʊˈkeɪ] interjection ***

1)

a) used for showing that you agree with something, approve of it, or understand it

"I'd like to buy some new clothes." "OK."

OK, but I don't see how that proves your point.

b) used for asking if someone agrees with what you have just said, or if he or she understands it

Let's go and see a film tonight, OK?

So that means that "C" is the best answer. OK?

2) used when you want to start talking about something or want to continue discussing it after a pause

OK, I think we were looking at page seven.

OK. Everyone ready?

3)

a) used when you want someone to stop arguing with you or criticizing you. This word often shows that you accept what they are saying but do not think it is important

"Your boss will be angry if you're late." "OK, but he won't sack me."

OK. You're right. I should have called you sooner.

b) used for showing that you are ready to end a conversation, especially on the telephone

OK, I just wanted to make sure that you got home.

II UK [ˌəʊˈkeɪ] / US [oʊˈkeɪ] adjective spoken ***

1) satisfactory. This word often shows that you think that something is not as good as it could or should be

The food was OK, but nothing special.

turn out OK (= end in a satisfactory way):

We didn't start on time, but everything turned out OK anyway.

2) [never before noun] allowed, suitable, or not likely to make you upset

it's OK to do something:

Are you saying it's OK to lie to your children?

it's OK for someone to do something:

The teacher said it was OK for me to leave class early.

it's OK by/with me:

It's OK by me if they come with us.

3) [never before noun] not injured, damaged, ill, or upset

The doctors say he'll be OK in a few weeks.

Are you OK? You look tired.

4) if someone is OK, you like them or respect them

Paul is an OK kind of guy.

I like Jim. He's OK.

•

it's/that's OK — spoken used for saying that something does not make you angry, upset, or sad

"I'm sorry I said that." "Don't worry. It's OK."

Derived word:
OK
UK / US adverb

I think I did OK in the exam.

Things around here were going OK until you arrived.

III UK [ˌəʊˈkeɪ] / US [oʊˈkeɪ] verb [transitive]
Word forms "OK":
present tense I/you/we/they OK he/she/it OK's present participle OK'ing past tense OK'd past participle OK'd informal

to give permission or approval for something to happen

When he's OK'd the trip, I'll book the tickets.

IV UK [ˌəʊˈkeɪ] / US [oʊˈkeɪ] noun spoken

get/give someone the OK — to get or give someone permission to do something

I'll place the order as soon as you give me the OK.