This is the current revision of Tune as edited by DavidB4-bot(talk | contribs) at 15:31, July 28, 2016. This URL is a permanent link to this version of this page.
As a noun, a tune is a melody; a succession of notes that can be said to "make sense" to the aural sensitivity of the listener. It can also refer to a song, even if that song contains more than one melody.
As a verb to tune means to bring into proper intonation. (As in "tune a piano.")