Definitions:

1. adjust for (better) functioning verb
   • tune the engine
2. adjust the pitches of musical instruments verb
   • My piano needs to be tuned.
3. the property of producing accurately a note of a given pitch noun
   • They cannot sing in tune.

Synonyms:

• air
• tune up

NearBy Words:

• tune-up
• tuneful
• tunefully
• tunefulness
• tuneless
• tunelessly
• tuner