The meaning of HILARIOUS is marked by or causing hilarity : extremely funny. How to use hilarious in a sentence.

(Definition of hilarious from the Cambridge Academic Content Dictionary © Cambridge University Press)

1. arousing great merriment; extremely funny. 2. boisterously merry or cheerful: feeling hilarious from the champagne.

Usage What does hilarious mean? Hilarious means extremely funny, like literally lol funny. Hilarious is most commonly used to describe someone or something (like a joke or a movie) …

Definition of hilarious adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Nov 6, 2025 · Learned borrowing from Latin hilaris (“cheerful”) +‎ -ous, from Ancient Greek ἱλαρός (hilarós, “cheerful, merry”). hilarious (comparative more hilarious, superlative most hilarious) …

If something is hilarious, it is extremely funny and makes you laugh a lot. We thought it was hilarious when we first heard about it. He had a fund of hilarious tales on the subject.

hilarious (adjective) hilarious /hɪ ˈ lerijəs/ adjective Britannica Dictionary definition of HILARIOUS [more hilarious; most hilarious] : very funny

Hilarious is an adjective that describes a high degree of humor. Things that are funny can cause you to smile or giggle, but when something is hilarious, it causes you to laugh out loud.

Synonyms for HILARIOUS: funny, humorous, comedic, amusing, comical, ridiculous, comic, hysterical; Antonyms of HILARIOUS: lame, serious, humorless, earnest, unfunny, solemn, …