Mirth \Mirth\, n. [OE. mirthe, murthe, merthe, AS. myr[eth], myrg[eth], merh[eth], mirh[eth]. See Merry.]

1. Merriment; gayety accompanied with laughter; jollity.

Then will I cause to cease . . . from the streets of Jerusalem, the voice of mirth. --Jer. vii. 34.

2. That which causes merriment. [Obs.]

--Shak.

Syn: Merriment; joyousness; gladness; fun; frolic; glee; hilarity; festivity; jollity. See Gladness.

Source: Webster's Revised Unabridged Dictionary (1913)