· OK (spelling variations include okay, OK, and ok) is an English word (originally American English) denoting approval, acceptance, agreement, assent, acknowledgment, or a sign of indifference OK is frequently used as a loanword in other languages It has been described as the most frequently spoken or written word on the planet The origins of the word are disputedI have always heard 'okeydokey' used to indicate understanding or compliance, in situations where "OK" might be used for that purpose (only) Eg I'll see you at 2 PM Okeydokey Lock the office after you leave Okey dokey I would not expect it to be used for allDefinition of okeydoke exclamation in Oxford Advanced Learner's Dictionary Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more 10 Ways To Say Yes And No In English What is okey dokey