Source : Webster's Revised Unabridged Dictionary (1913)

Tuneless \Tune"less\, a.
   1. Without tune; inharmonious; unmusical. `` Thy tuneless
      serenade.'' --Cowley.

            How often have I led thy sportive choir, With
            tuneless pipe, beside the murmuring Loire!
                                                  --Goldsmith.

   2. Not employed in making music; as, tuneless harps.

   3. Not expressed in music or poetry; unsung. [R.]

Source : WordNet®

tuneless
     adj : not having a musical sound or pleasing tune [syn: {untuneful},
            {unmelodious}] [ant: {tuneful}]