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hilarity (noun) loud laughter; mirth.
Hilarity is great fun causing loud laughter. A movie the type of Charlie Chaplin causes hilarity, that is, it makes us laugh loudly in merriment. If your joke makes people laugh noisily, your joke causes hilarity.
- The buffoon's costumes and tricks caused a great hilarity, especially among children who laughed their sides out noisily during the whole show.
- His jokes did not cause the hilarity he had expected of them. Instead of making the company laugh, they left them bored.