From WordNet (r) 3.0 (2006):
tune
n 1: a succession of notes forming a distinctive sequence; "she
was humming an air from Beethoven" [syn: tune, melody,
air, strain, melodic line, line, melodic phrase]
2: the property of producing accurately a note of a given pitch;
"he cannot sing in tune"; "the clarinet was out of tune"
3: the adjustment of a radio receiver or other circuit to a
required frequency
v 1: adjust for (better) functioning; "tune the engine" [syn:
tune, tune up]
2: adjust the pitches of (musical instruments); "My piano needs
to be tuned" [syn: tune, tune up] [ant: untune]