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laughter

/ˈlɑːftə/ noun

In Latin: rīsus, cachinnus Wiktionary

noun Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about laughter at Wordnik → Where our words come from →

  1. The sound of laughing, produced by air so expelled; any similar sound.
    Their loud laughter betrayed their presence.
  2. A movement (usually involuntary) of the muscles of the laughing face, particularly of the lips, and of the whole body, with a peculiar expression of the eyes, indicating merriment, satisfaction or derision, and usually attended by a sonorous and interrupted expulsion of air from the lungs.
  3. A reason for merriment.

Origin

From Middle English laughter, laghter, laȝter, from Old English hleahtor (“laughter, jubilation, derision”), from Proto-Germanic *hlahtraz (“laughter”), from Proto-Indo-European *klek-, *kleg- (“to shout”). Cognate with German Gelächter (“laughter, hilarity, merriment”), Danish and Norwegian latter (“laughter”), Icelandic hlátur (“laughter”). More at laugh.

From Wiktionary, via Kaikki.org (CC BY-SA)