English

Definition of hilarious adjective from the Oxford Advanced Learner's Dictionary

 

hilarious

 adjective
adjective
BrE BrE//ˈleəriəs//
 
; NAmE NAmE//ˈleriəs//
 
 
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extremely funny a hilarious joke/story Lynn found the whole situation hilarious. Do you know Pete? He's hilarious. Synonymsfunnyamusing entertaining witty humorous comic hilariousThese words all describe somebody/​something that makes you laugh or smile.funny that makes you laugh:a funny story He was a very funny guy.amusing funny and enjoyable:It’s a very amusing game to play.entertaining amusing and interesting:It was a very entertaining evening.witty clever and amusing; able to say or write clever and amusing things:a witty remark a witty public speakerhumorous funny and entertaining; showing a sense of humour:a humorous look at the world of fashioncomic that makes you laugh:Many of the scenes in the book are richly comic.hilarious extremely funnyfunny, amusing, humorous or comic? Amusing is the most general of these words because it includes the idea of being enjoyable as well as making people laugh and can be used to describe events, activities and occasions:an amusing party/​game/​evening a funny/​humorous/​comic party/​game/​evening. Humorous is more about showing that you see the humour in a situation, than actually making people laugh out loud. Comic is used especially to talk about writing and drama or things that are funny in a deliberate and theatrical way. It is not used to describe people (except for comic writers). Funny can describe people, jokes and stories, things that happen, or anything that makes people laugh.Patterns a(n) funny/​amusing/​entertaining/​witty/​humorous/​comic story a(n) funny/​amusing/​entertaining/​witty/​humorous speech a(n) funny/​entertaining/​witty/​humorous/​comic writer a(n) funny/​amusing/​hilarious joke to find something funny/​amusing/​entertaining/​witty/​humorous/​hilarious Word Origin early 19th cent.: from Latin hilaris (from Greek hilaros ‘cheerful’) + -ous. The sense ‘exceedingly amusing’ dates from the 1920s.
See the Oxford Advanced American Dictionary entry: hilarious