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- DictionaryLaugh·ter/ˈlaftər/
noun
- 1. the action or sound of laughing: "he roared with laughter"
noun
Laughter is a pleasant physical reaction and emotion consisting usually of rhythmical, often audible contractions of the diaphragm and other parts of the respiratory system. It is a response to certain external or internal stimuli. Laughter can rise from such activities as being tickled, or from humorous stories, imagery, videos or thoughts. Most commonly, it is considered an auditory expression o... Wikipedia