- To cachinnate is to laugh loudly or laugh hard.
When you give a big, loud laugh at a joke, this is an example of a time when you cachinnate.
cachinnate definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
- cachinnation noun
cachinnate definition by American Heritage Dictionary
intransitive verb cach·in·nat·ed, cach·in·nat·ing, cach·in·nates
To laugh hard, loudly, or convulsively; guffaw.
Origin: Latin cachinnāre, cachinnāt-, of imitative origin.
- cachˌin·naˈtion noun
- cachˈin·naˌtor noun