Definition of hilarity in English:

hilarity

Syllabification: hi·lar·i·ty
Pronunciation: /həˈlerədē
 
/

noun

1Extreme amusement, especially when expressed by laughter: his incredulous expression was the cause of much hilarity
More example sentences
  • There'll probably be a lot of laughter and hilarity, because the owner of the restaurant is absolutely hilarious.
  • The film veers in its perfectly-plotted course from absolute hilarity to extreme poignancy.
  • Meg made a face that was between confusion and extreme hilarity.
Synonyms
amusement, mirth, laughter, merriment, lightheartedness, levity, fun, humor, jocularity, jollity, gaiety, delight, glee, exuberance, high spirits; comedy
1.1Boisterous merriment: the noisy hilarity of the streets

Origin

late Middle English (in the sense 'cheerfulness'): from French hilarité, from Latin hilaritas 'cheerfulness, merriment', from hilaris (see hilarious).

Definition of hilarity in:

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Word of the day anomalous
Pronunciation: əˈnɒm(ə)ləs
adjective
deviating from what is standard, normal, or expected