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The meaning of HILARIOUS is marked by or causing hilarity : extremely funny. How to use hilarious in a sentence. HILARIOUS definition: 1. extremely funny and causing a lot of laughter: 2. extremely funny and causing a lot of…. Learn more. Find Hilarious GIFs that make your conversations more positive, more expressive, and more you. Definition of hilarious adjective in Oxford Advanced American Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. 1. arousing great merriment; extremely funny. 2. boisterously merry or cheerful: feeling hilarious from the champagne.

extremely funny: a hilarious story; a hilarious old movie. boisterously merry or cheerful: a hilarious celebration. cheerful. hi lar′i ous ness, n. 2. lively, jolly, rollicking, high-spirited. 2. sad, serious, solemn. In Lists: Humor and comedy, more... Synonyms: funny, amusing, hysterical, humorous, side-splitting, more... Hilarious means extremely funny, like literally lol funny. Hilarious is most commonly used to describe someone or something (like a joke or a movie) as super funny. Much less commonly, it used to mean very merry or cheerful, as in a hilarious celebration.