/ Dictionary / Index M mirth: Meaning and Definition of Find definitions for: mirth Pronunciation: (mûrth), [key] — n. gaiety or jollity, esp. when accompanied by laughter: the excitement and mirth of the holiday season. amusement or laughter: He was unable to conceal his mirth. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: mirth (Thesaurus) mirror-writing mirthful Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language