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See more synonyms for cachinnate on Thesaurus.com
verb (used without object), cach·in·nat·ed, cach·in·nat·ing.
  1. to laugh loudly or immoderately.
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Origin of cachinnate

1815–25; < Latin cachinnātus (past participle of cachinnāre to laugh aloud, laugh immoderately), equivalent to cachinn- laugh aloud + -ātus -ate1
Related formscach·in·na·tion, nouncach·in·na·tor, nouncach·in·na·to·ry [kak-uh-nuh-tawr-ee, -tohr-ee, kuh-kin-uh-] /ˈkæk ə nəˌtɔr i, -ˌtoʊr i, kəˈkɪn ə-/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged 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

British Dictionary definitions for cachinnation


  1. raucous laughter
  2. psychiatry inappropriate laughter, sometimes found in schizophrenia
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  1. (intr) to laugh loudly
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Derived Formscachinnatory, 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

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'.

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

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Online Etymology Dictionary, © 2010 Douglas Harper

cachinnation in Medicine


  1. Loud, hard, or compulsive laughter without apparent cause.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.