The sound of laughing, produced by air so expelled; any similar sound.
A movement (usually involuntary) of the muscles of the laughing face, particularly of the lips, and of the whole body, 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.
Lightness of manner or speech, frivolity; lack of appropriate seriousness; inclination to make a joke of serious matters.
A lighthearted or frivolous act.
The state or quality of being light, buoyancy.