- (n): the adjustment of a radio receiver or other circuit to a required frequency
- (n): the property of producing accurately a note of a given pitch; "he cannot sing in tune"; "the clarinet was out of tune"
- (n): a succession of notes forming a distinctive sequence; "she was humming an air from Beethoven"
- (v): of musical instruments; "My piano needs to be tuned"
- (v): adjust for (better) functioning; "tune the engine"