from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Approval; agreement: Get your supervisor's OK before taking a day off.
  • adj. Agreeable; acceptable: Was everything OK with your stay?
  • adj. Satisfactory; good: an OK fellow.
  • adj. Not excellent and not poor; mediocre: made an OK presentation.
  • adj. In proper or satisfactory operational or working order: Is the battery OK?
  • adj. Correct: That answer is OK.
  • adj. Uninjured; safe: The skier fell but was OK.
  • adj. Fairly healthy; well: Thanks to the medicine, the patient was OK.
  • adv. Fine; well enough; adequately: a television that works OK despite its age.
  • interj. Used to express approval or agreement.
  • transitive v. To approve of or agree to; authorize.
  • abbr. Oklahoma

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. endorsement; approval
  • v. To approve.
  • v. To confirm by activating a button marked OK.
  • adj. all right, permitted
  • adj. satisfactory, reasonably good; not exceptional
  • adj. in good health or a good emotional state
  • adv. satisfactorily, sufficiently well
  • interj. Used to indicate acknowledgement or acceptance.
  • interj. An utterance expressing exasperation, similar to "all right!"
  • interj. Used to introduce a sentence in order to draw attention to the importance of what is being said.
  • proper n. Acronym of Oklahoma, a state of the United States of America.

from The Century Dictionary and Cyclopedia

  • n. A Middle English variant of oak.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • v. give sanction to
  • n. an endorsement
  • adv. in a satisfactory or adequate manner
  • adj. being satisfactory or in satisfactory condition
  • n. a state in south central United States
  • adv. an expression of agreement normally occurring at the beginning of a sentence
  • adj. being satisfactory or in satisfactory condition
  • n. an endorsement


from The American Heritage® Dictionary of the English Language, 4th Edition

Abbreviation of oll korrect, slang respelling of all correct.

from Wiktionary, Creative Commons Attribution/Share-Alike License

An abbreviated comical spelling of "all correct" (oll korrect), first appearing in print in The Boston Morning Post 1839 March 23; part of a fad for similar fanciful abbreviations in the United States during the late 1830s. See Metcalf (2011).



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  • Vox did an article on this word.

    How it started from Boston and spread through the Telegraphs.

    September 17, 2018

  • To be like What? Or thats weird.

    August 2, 2012

  • I'm afraid this might not be the actual etymology, capco. In the "etymologies" section of this page you can find a more documented one. See also here for a list of suggested etymologies, with references.

    November 14, 2009

  • OK or Okay: (informal). Interjection indicating agreement to approval of what

    Somebody said or done, also indicating that something is finished, and

    No further action is to be taken.

    Origin: O. for Optimum (Latin) the best or the most favorable. And,

    K. (Chem.). A Symbol for equilibrium constant; the state reached

    In a reversible reaction velocities in the two opposing directions

    Are equal, so that the system has no further tendency to change.

    (Chambers Science and Technology Dictionary).

    The O. and the K. were used after double checking a formula, or a product, in order to indicate that it has passed. After the first test the O. For Optimum, was used to indicate that the formula passed. Then the K. was shown indicating ( for no further action is needed) Therefore when the symbol (OK) appeared in front of a formula it indicated that it has been double checked, and it is passed.

    November 14, 2009