phrasal verb

• 1also tune something up, tune up somethingAdjust a musical instrument to the correct or uniform pitch.

  ‘we hear a string quartet tuning up’

  More example sentences

  • ‘the band tunes up its instruments’

  Synonyms

  adjust, adjust to the correct pitch, tune up

• 2tune something up, tune up somethingAdjust an engine or mechanism so that it performs at maximum efficiency.

  ‘cars can be tuned up for greater power and economy’

  More example sentences

  • ‘state officials have been tuning up an emergency plan’