OK
How to Use OK
Learner’s notesIn plain EnglishA catch-all word for "fine," "acceptable," or "yes, agreed" — one of the most widely recognized words in the world.
Very informal/neutral; fine in speech and casual writing, but "acceptable" or "approved" reads better in formal documents.
Word Forms
more OK comparative, OKer comparative, more OK comparative, OKed past tense, OK'd past tense, OK'ed past tense, OKs plural, OK's plural, OKs singular, OK's singular, most OK superlative, OKest superlative, most OK superlative
Fill the Gap
Can you complete this real example?
Is it _____ if I leave early today?
Etymology
Its exact origin is debated, but the most widely accepted story traces it to a 1839 Boston newspaper fad for joke misspellings — "oll korrect" for "all correct" — abbreviated to OK, which then got a huge popularity boost from Martin Van Buren's 1840 presidential campaign (his nickname was "Old Kinderhook").