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OK

INFORMAL
exclamation

exclamation: OK; exclamation: okay

1. used to express assent, agreement, or acceptance.
"OK, I'll pass on your message"

synonyms:all right, right, right then, right you are, very well, yes, very good, fine, agreed; More
used to introduce an utterance.

"“OK, let's go.”"

used at the end of a statement to invite agreement, approval, or confirmation.
"humor me, OK?"