follow Dictionary.com

Get the details behind our redesign

hilarious

[hi-lair-ee-uh s, -lar-, hahy-] /hɪˈlɛər i əs, -ˈlær-, haɪ-/
adjective
1.
arousing great merriment; extremely funny:
a hilarious story; a hilarious old movie.
2.
boisterously merry or cheerful:
a hilarious celebration.
3.
merry; cheerful.
Origin
1815-1825
1815-25; < Latin hilar(is), hilar(us) cheerful (< Greek hilarós) + -ious
Related forms
hilariously, adverb
hilariousness, noun
hyperhilarious, adjective
hyperhilariously, adverb
hyperhilariousness, noun
unhilarious, adjective
unhilariously, adverb
unhilariousness, noun
Synonyms
2. lively, jolly, rollicking, high-spirited.
Antonyms
2. sad, serious, solemn.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source
British Dictionary definitions for un hilarious

hilarious

/hɪˈlɛərɪəs/
adjective
1.
very funny or merry
Derived Forms
hilariously, adverb
hilariousness, noun
Word Origin
C19: from Latin hilaris glad, from Greek hilaros
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
Cite This Source
Word Origin and History for un hilarious
hilarious
1823, "cheerful," from L. hilaris (see hilarity) + -ous. Meaning "boisterously joyful" is from 1830s.
Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source

Word of The Day

Difficulty index for hilarious

Some English speakers likely know this word

Word Value for un

2
4
Scrabble Words With Friends