Read the dictionary definition of tune. All definitions for this word.
1. the adjustment of a radio receiver or other circuit to a required frequency
2. the property of producing accurately a note of a given pitch
1. he cannot sing in tune
2. the clarinet was out of tune
3. a succession of notes forming a distinctive sequence
1. she was humming an air from Beethoven
4. adjust the pitches of (musical instruments)
1. My piano needs to be tuned
5. adjust for (better) functioning
1. tune the engine