verb (used without object), cach·in·nat·ed, cach·in·nat·ing.

to laugh loudly or immoderately.

Nearby words

  1. cacheu,
  2. cachexia,
  3. cachexia hypophysiopriva,
  4. cachexia strumipriva,
  5. cachexy,
  6. cachinnation,
  7. cachoeiro do itapemirim,
  8. cachou,
  9. cachucha,
  10. cacimbo

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 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for cachinnation

British Dictionary definitions for cachinnation



raucous laughter
psychiatry inappropriate laughter, sometimes found in schizophrenia



(intr) to laugh loudly
Derived Formscachinnatory, adjective

Word Origin for cachinnate

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
Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for cachinnation




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.