There are 2 main definitions of tune up in English:

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tune up 1

(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

Definition of tune up in:

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There are 2 main definitions of tune up in English:

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tune-up 2 Syllabification: tune-up
Pronunciation: /ˈt(y)o͞onˌəp/
(also tuneup)

noun

1An act of tuning something up: take your car in for a tune-up if it’s an older model
More example sentences
  • The engine just needed a good tune-up.
  • She prepared me like I was going to war: new tires all around for the jeep, a tune-up, chains, jumper cables, and a box packed with warm clothes and flares, in case of an emergency.
  • They never need oil changes, air filters, tune-ups, mufflers, timing belts, or emission tests.
Synonyms
service, servicing, maintenance, repairs, fine-tuning, tweaking
1.1chiefly US A sporting event that serves as a practice for a subsequent event: a tune-up for the college’s fall league
More example sentences
  • Campbell billed the event as a good tune-up for the postseason.
  • Coming into the final Grand Slam of a dismal season, Sampras had been knocked out early in a tune-up event, but refused to hang his head.
  • The Aussie will put away his grass court shoes for another season, having lifted titles here and at the classic tune-up event at Queen's Club last month.

Definition of tune up in:

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