Laughter

n.

1.

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. The act of laughter, which is a sweet contraction of the muscles of the face, and a pleasant agitation of the vocal organs, is not merely, or totally within the jurisdiction of ourselves. - Sir T. Browne. Archly the maiden smiled, and with eyes overrunning with laughter. - Longfellow.

Noun	1.	laughter - the sound of laughing Synonyms: laugh
	2.	laughter - the activity of laughing; the manifestation of joy or mirth of scorn; "he enjoyed the laughter of the crowd"

Homeric laughter, amusement, belly laugh, boff, boffola, burst of laughter, cachinnation, cackle, chortle, chortling, chuckle, convulsion, crow, fit of laughter, frivolity, fun, gales of laughter, giggle, glee, gleefulness, guffaw, ha-ha, hearty laugh, hee-haw, hee-hee, high glee, hilariousness, hilarity, ho-ho, horselaugh, jocularity, jocundity, jolliness, jollity, joviality, joy, joyfulness, joyousness, laugh, laughing, levity, merriment, merriness, mirth, mirthfulness, outburst of laughter, peal of laughter, risibility, roar of laughter, shout, shout of laughter, shriek, snicker, snickering, snigger, sniggering, snort, tee-hee, titter, yuck, yuk-yuk