The Collaborative International Dictionary of English v.0.48:

Glee \Glee\ (gl[=e]), n. [OE. gle, gleo, AS. gle['o]w, gle['o],
   akin to Icel. gl[=y]: cf. Gr. ? joke, jest.]
   [1913 Webster]
   1. Music; minstrelsy; entertainment. [Obs.] --Chaucer.
      [1913 Webster]

   2. Joy; merriment; mirth; gayety; paricularly, the mirth
      enjoyed at a feast. --Spenser.
      [1913 Webster]

   3. (Mus.) An unaccompanied part song for three or more solo
      voices. It is not necessarily gleesome.
      [1913 Webster]

WordNet (r) 3.0 (2006):

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