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[kak-uh-neyt] /ˈkæk əˌneɪt/
verb (used without object), cachinnated, cachinnating.
to laugh loudly or immoderately.
Origin of cachinnate
1815-25; < Latin cachinnātus (past participle of cachinnāre to laugh aloud, laugh immoderately), equivalent to cachinn- laugh aloud + -ātus -ate1
Related forms
cachinnation, noun
cachinnator, noun
[kak-uh-nuh-tawr-ee, -tohr-ee, kuh-kin-uh-] /ˈkæk ə nəˌtɔr i, -ˌtoʊr i, kəˈkɪn ə-/ (Show IPA),
adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for cachinnation
Historical Examples
  • Chip's nervous system did not demand the relief of cachinnation.

    Chip, of the Flying U B. M. Bower
  • And there it swung to and fro, moved by the violence of its cachinnation.

    Vikram and the Vampire Richard F. Burton
  • Then, look at the baby, when it has turned into a little boy or girl, and come up in some degree to the cachinnation.

  • Why, one might as well talk of a laughing death's-head,—the cachinnation of a monk's memento mori.

  • Never did a General and his Chief-of-Staff, in a more unseemly state of cachinnation, ride along a picket-line.

    The Black Phalanx Joseph T. Wilson
  • The former was accompanied by a running fire of cachinnation from the delighted audience.

    Ellen Terry and Her Sisters T. Edgar Pemberton
  • Then right under me commenced a vehement rasping and scratching in the floor, accompanied by continuous groans and cachinnation.

    The Devil's Elixir E. T. A. Hoffmann
  • She is possessed with a laughing demon, and has been in a constant state of cachinnation the whole trip.

    The houseboat book William F. Waugh
  • Then, look at the baby when it has turned into a little boy or girl, and come up in some degree to the cachinnation.

British Dictionary definitions for cachinnation


raucous laughter
(psychiatry) inappropriate laughter, sometimes found in schizophrenia


(intransitive) to laugh loudly
Derived Forms
cachinnatory, adjective
Word Origin
C19: from Latin cacchināre, probably of imitative origin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for cachinnation

"loud laughter," 1620s, from Latin cachinnationem (nominative cachinnatio) "violent laughter, excessive laughter," noun of action from past participle stem of cachinnare "to laugh immoderately or loudly," of imitative origin. Cf. Sanskrit kakhati "laughs," Greek kakhazein "to laugh loudly," Old High German kachazzen, English cackle, Armenian xaxanc'.



"to laugh loudly or immoderately," 1824, from Latin cachinnatum, past participle of cachinnare (see cachinnation). Related: Cachinnated; cachinnating.

Online Etymology Dictionary, © 2010 Douglas Harper
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cachinnation in Medicine

cachinnation cach·in·na·tion (kāk'ə-nā'shən)
Loud, hard, or compulsive laughter without apparent cause.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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