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

  • n. Swiftness of action or motion; speed. See Synonyms at haste.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Speed.
  • n. The speed of individual waves (as opposed to the speed of groups of waves).

from the GNU version of the Collaborative International Dictionary of English

  • n. Rapidity of motion; quickness; swiftness.

from The Century Dictionary and Cyclopedia

  • n. Rapidity of motion; swiftness; quickness; speed.
  • n. Velocity, Swiftness, etc. See quickness.

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

  • n. a rate that is rapid


French célérité, from Old French, from Latin celeritās, from celer, swift.
(American Heritage® Dictionary of the English Language, Fourth Edition)
French célérité > Latin celeritas > Latin celer, fast, swift. (Wiktionary)



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  • Famous celery.

    January 24, 2008

  • 'A rate that is rapid'.

    A definition so crap it
    reminds us that Weirdnet is
    terminally vapid.

    January 24, 2008

  • This is a good word, we need to start using it more often.

    October 22, 2007

  • Thus with imagined wings our swift scene flies
    In motion with no less celerity
    Than that of thought...
    --Chorus, Henry V, by W. Shakespeare

    October 22, 2007