Definition of tune up in English:

tune up

(Of a musician) adjust one’s instrument to the correct or uniform pitch: we could hear the band tuning up
More example sentences
  • The backstage area at the club is filled with a discordant mix of musicians tuning up and trams for the Disneyland concourse whizzing by.
  • In between the dance numbers and while the musicians were tuning up and the dancers changing shoes; you could indulge in some celebrity spotting.
  • Musicians in Swindon are tuning up.
See parent entry: tune

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