Source : Webster's Revised Unabridged Dictionary (1913)

Tirralirra \Tir"ra*lir`ra\, n.
   A verbal imitation of a musical sound, as of the note of a
   lark or a horn.

         The lark, that tirra lyra chants.        --Shak.

         ``Tirralira, '' by the river, Sang Sir Lancelot.
                                                  --Tennyson.