Source : Webster's Revised Unabridged Dictionary (1913)

Glee \Glee\ (gl[=e]), n. [OE. gle, gleo, AS. gle['o]w, gle['o],
   akin to Icel. gl[=y]: cf. Gr. chley`n joke, jest.]
   1. Music; minstrelsy; entertainment. [Obs.] --Chaucer.

   2. Joy; merriment; mirth; gayety; paricularly, the mirth
      enjoyed at a feast. --Spenser.

   3. (Mus.) An unaccompanied part song for three or more solo
      voices. It is not necessarily gleesome.

Source : WordNet®

glee
     n 1: great merriment [syn: {hilarity}, {mirth}, {mirthfulness}, {gleefulness}]
     2: malicious satisfaction [syn: {gloat}, {gloating}]