• (RP) IPA: /hɪˈlɛəɹiəs/
• (America) IPA: /hɪˈlɛ(ə)ɹiəs/
• (New England) IPA: /hɪˈlæɹiəs/

hilarious

1. Very funny; causing great merriment and laughter.

   Synonyms: Thesaurus:funny

   a hilarious joke

2. Full of hilarity; merry.
   • 1944, Douglas Stewart, A Girl with Red Hair, and Other Stories, page 60:

     Rounding up the animals in the misty paddocks, with the blackbirds singing as the morning whitened, he felt hilarious, light-headed. He'd clap the cows on their rumps and shout "Come along, there! Come along there, me Irish darlint."

• exhilarate
• exhilaration
• Hilary

• French: hilarant
• German: zum Totlachen, urkomisch, vergnügt, irrsinnig witzig
• Italian: esilarante, spassoso
• Portuguese: hilário, hilariante
• Russian: умори́тельный
• Spanish: hilarante, descacharrante, desopilante (rare)