tune up

To tune up is to balance or adjust a car's engine or a musical instrument so that it works correctly. You better tune up your instrument before a concert, or else you could turn off your fans.

Every motor vehicle needs a tune up now and then, and even your bicycle can benefit from a tune up. When a mechanic tunes up a car, she checks the systems and important parts and makes any needed adjustments. When a musician tunes up a guitar, he changes the instrument's pitch so that its sound isn't too sharp or flat. The musical meaning of tune up came first.

Definitions of tune up
1

v adjust for (better) functioning

Synonyms:
tune
Types:
fine-tune, tweak
adjust finely
service
make fit for use
tune in
regulate (a radio or television set) in order to receive a certain station or program
Type of:
adjust, correct, set
alter or regulate so as to achieve accuracy or conform to a standard

v adjust the pitches of (musical instruments)

Synonyms:
tune
Antonyms:
untune
cause to be out of tune
Type of:
adjust, correct, set
alter or regulate so as to achieve accuracy or conform to a standard

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