tune in WordNet English dictionary

1. a succession of notes forming a distinctive sequence
   "she was humming an air from Beethoven"
   tune  melody  air  strain  melodic line  line  melodic phrase 
   
2. the adjustment of a radio receiver or other circuit to a required frequency
   tune 
   
3. the property of producing accurately a note of a given pitch
   "he cannot sing in tune"; "the clarinet was out of tune"
   tune 
   

1. adjust the pitches of (musical instruments)
   "My piano needs to be tuned"
   tune  tune up 
   
2. adjust for (better) functioning
   "tune the engine"
   tune  tune up