Dictionary.net

the activity of laughing; the manifestation of joy or mirth of scorn; "he enjoyed the laughter of the crowd"

the activity of laughing; the manifestation of joy or mirth of scorn; "he enjoyed the laughter of the crowd"

An involuntary expression of merriment and pleasure; it includes the patterned motor responses as well as the inarticulate vocalization.

Convulsive sounds and movements caused by merriment.

Act or noise of laughing.

Act of laughing.

n. An involuntary movement of the muscle of the face, or a peculiar expression of the eyes, indicating merriment or satisfaction, and usually attended by a sonorous and interrupted expulsion of air from the lungs.