Definitions for: Hilarious

[adj] marked by or causing boisterous merriment or convulsive laughter; "hilarious broad comedy"; "a screaming farce"; "uproarious stories"

Webster (1913) Definition: Hi*la"ri*ous, a. [L. hilaris, hilarus, Gr. ?; cf. ?
gracious, kindly.]
Mirthful; noisy; merry.

Synonyms: humorous, humourous, screaming(a), uproarious