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. verb
    adjust for (better) functioning
    synonyms: tune
    see moresee less
    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
  2. verb
    adjust the pitches of (musical instruments)
    synonyms: tune
    see moresee less
    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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