Joy; happiness; great delight, especially from one's own good fortune or from another's misfortune.
Music; minstrelsy; entertainment.
An unaccompanied part song for three or more solo voices, not necessarily merry.
To sing a glee (unaccompanied part song).
a tendency to expect the best, or at least, a favourable outcome
the doctrine that this world is the best of all possible worlds
the belief that good will eventually triumph over evil