- 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.
Meaning of 'laughter' (Princeton's WordNet)
1 . laughter
[ n]
Meaning (1): - the activity of laughing; the manifestation of joy or mirth or scorn