From WordNet (r) 3.0 (2006):
laugh
n 1: the sound of laughing [syn: laugh, laughter]
2: a facial expression characteristic of a person laughing; "his
face wrinkled in a silent laugh of derision"
3: a humorous anecdote or remark intended to provoke laughter;
"he told a very funny joke"; "he knows a million gags";
"thanks for the laugh"; "he laughed unpleasantly at his own
jest"; "even a schoolboy's jape is supposed to have some
ascertainable point" [syn: joke, gag, laugh, jest,
jape]
v 1: produce laughter [syn: laugh, express joy, express
mirth] [ant: cry, weep]