OK
1 Americanadjective
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all right; proceeding normally; satisfactory or under control.
Things are OK at the moment.
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correct, permissible, or acceptable; meeting standards.
Is this suit OK to wear to a formal party?
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doing well or in good health; managing adequately.
She's been OK since the operation.
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adequate but unexceptional or unremarkable; tolerable.
The job they did was OK, nothing more.
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estimable, dependable, or trustworthy; likable.
an OK person.
adverb
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all right; well enough; successfully; fine.
She'll manage OK on her own.
He sings OK, but he can't tap dance.
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(used as an affirmative response) yes; surely.
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(used as an interrogative or interrogative tag) all right?; do you agree?
interjection
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(used to express agreement, understanding, acceptance, or the like).
OK, I'll get it for you.
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(used as an introductory or transitional expression).
OK, now where were we?
noun
verb (used with object)
abbreviation
adjective
-
in good or satisfactory condition
-
permissable
is it O.K. if I go home now?
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acceptable but not outstanding
the party was O.K.
verb
noun
abbreviation
Usage
And is OK in the dictionary? OK is a word. The term OK may also be spelled okay. There is confusion as to whether OK is a word because it is informal, looks like an acronym, and is spelled with all capital letters. However, none of these elements disqualify OK from being a valid word.
Other Word Forms
Etymology
Origin of OK
Initials of a facetious folk phonetic spelling, i.e., oll or orl korrect representing all correct, first attested in Boston, Massachusetts, in 1839, then used in 1840 by Democrat partisans of Martin Van Buren during his election campaign, who allegedly named their organization, the O.K. Club, in allusion to the initials of Old Kinderhook, Van Buren's nickname, derived from his birthplace, Kinderhook, New York
Explanation
Anything that's ok is all right or fine. A perfectly ok answer when your dad asks how your homework is going is "Ok." If something's ok, it's not terrible, but it's not wonderful either — it's simply ok. You can use this informal word to ask if something's acceptable: "Hey, is it ok if I borrow your car?" It's also a good way to check up on someone's well-being: "You look sad today; are you ok?" Ok is the only known example that's still in use of a 19th century slang trend of abbreviating deliberate misspellings. Ok comes from "oll korrect."
Vocabulary lists containing ok
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
“If people were looking to sell, OK, here’s a negative headline for sure,” ProcureAM CEO Andrew Chanin told MarketWatch last week about the Blue Origin incident.
From MarketWatch • Jun. 2, 2026
Which seemed OK to me, as I have always been more than fine doing things solo, but I could see the red flags waving.
From Salon • Jun. 1, 2026
While Kant feels OK about her nest egg today, she’s worried it might shrink if the stock-market falls from its record high levels.
From The Wall Street Journal • May 31, 2026
"I'm cramping a little bit but it's OK, it's all good. I don't have any words now, I'm extremely happy," said Potapova.
From BBC • May 30, 2026
Madeline: OK, maybe not just a single book, but if you read enough you'll get there.
From "Everything, Everything" by Nicola Yoon
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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.