Mirth is defined as laughter or amusement.
An example of mirth is when you laugh at a joke.
joyfulness, gaiety, or merriment, esp. when characterized by laughter
Origin of mirthMiddle English myrthe from Old English myrgth, pleasure, joy from base of myrig, pleasant: see merry
Gladness and merriment, especially when expressed by laughter.
Origin of mirthMiddle English from Old English myrgth ; see mregh-u- in Indo-European roots.
Old English myrÄ¡Ã¾, approximately equivalent to merry +"Ž -th.