Tune up has 3 different meanings across 1 category:
Verb
Verb
1
adjust for (better) functioning
"tune the engine"
2
adjust the pitches of (musical instruments)
"My piano needs to be tuned"
3
To make adjustments (to an engine or bicycle drivetrain) in order to improve its performance.
Broader Terms (hypernyms)
Narrower Terms (hyponyms)