Source : Webster's Revised Unabridged Dictionary (1913)

Songster \Song"ster\, n. [AS. sangestre a female singer.]
   1. One who sings; one skilled in singing; -- not often
      applied to human beings.

   2. (Zo["o]l.) A singing bird.

Source : WordNet®

songster
     n 1: a composer of words or music for popular songs [syn: {songwriter},
           {ballad maker}]
     2: a person who sings
     3: any bird having a musical call [syn: {songbird}]