[ hi-lar-i-tee, -lair-, hahy- ]
/ hɪˈlær ɪ ti, -ˈlɛər-, haɪ- /


cheerfulness; merriment; mirthfulness.
boisterous gaiety or merriment.

Nearby words

  1. hiker,
  2. hikoi,
  3. hilar,
  4. hilarious,
  5. hilariously,
  6. hilarius,
  7. hilarus,
  8. hilary,
  9. hilary of poitiers,
  10. hilary of poitiers, saint

Origin of hilarity

1560–70; earlier hilaritie < Latin hilaritās, equivalent to hilari(s) (see hilarious) + -tās -ty2

2. See mirth.

Related formshy·per·hi·lar·i·ty, noun

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

Examples from the Web for hilarities

British Dictionary definitions for hilarities


/ (hɪˈlærɪtɪ) /


mirth and merriment; cheerfulness
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 hilarities



mid-15c., from Latin hilaritatem (nominative hilaritas) "cheerfulness, gaiety, merriment," from hilaris "cheerful, gay," from Greek hilaros "cheerful, gay, merry, joyous," related to hilaos "graceful, kindly." In ancient Rome, Hilaria (neuter plural of hilaris) were a class of holidays, times of pomp and rejoicing; there were public ones in honor of Cybele at the spring equinoxes as well as private ones on the day of a marriage or a son's birth.

Online Etymology Dictionary, © 2010 Douglas Harper