the activity of laughing; the manifestation of joy or mirth or scorn
He enjoyed the laughter of the crowd.
source: WordNet 3.0
A movement (usually involuntary) of the muscles of the face, particularly of the lips, 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. See Laugh, v. i.
