1. (v. i.) To show mirth, satisfaction, or derision, by peculiar movement of the muscles of the face, particularly of the mouth, causing a lighting up of the face and eyes, and usually accompanied by the emission of explosive or chuckling sounds from the chest and throat; to indulge in laughter.

2. (v. i.) Fig.: To be or appear gay, cheerful, pleasant, mirthful, lively, or brilliant; to sparkle; to sport.

3. (v. t.) To affect or influence by means of laughter or ridicule.

4. (v. t.) To express by, or utter with, laughter; -- with out.

5. (n.) An expression of mirth peculiar to the human species; the sound heard in laughing; laughter. See Laugh, v. i.

Homeric laughter be in heaven be in stitches be pleased beam belittle belly laugh blue story boff boffola break up brush aside burst into laughter burst of laughter burst out burst out laughing burst with laughter bust a gut cachinnate cachinnation cackle caper caracole chirp chirrup chortle chuckle convulsion crack up crow dance delight deny deride die with delight dirty joke dirty story dismiss disregard double entendre ethnic joke feel happy fit of laughter frolic fun funny story gag gales of laughter gambol giggle glow go into convulsions go into hysterics go into raptures good one good story grin guffaw ha-ha hearty laugh hee-haw hee-hee hilarity ho-ho hoot horselaugh howler ignore jape jeer at jest jestbook joke joy lampoon laugh at laugh it up laugh outright laughing laughter lilt minimize nearly die laughing outburst of laughter panic parody pasquil pasquinade peal of laughter play point poke fun at pooh-pooh purr radiate cheer reject rib tickler ridicule riot risibility roar roar of laughter roar with laughter roast romp satirize scoff at scorn scream shake like jelly shake with laughter shout shout of laughter shriek shrug off sick joke sidesplitter sight gag simper sing skip smile smirk snicker sniggle snort sparkle split split with laughter sport spurn story take great satisfaction taunt tease tee-hee titter tread on air visual joke wheeze whistle whoop wide berth wow yarn yuck yuk-yuk