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English definition of “tune up (something)”

tune up (something)

verb [T] phrasal verb with tune  /tun/ us  

(PREPARE)

to prepare for a performance or competition, or to adjust an instrument for playing: Yards away on the infield, a marching band was tuning up.
(Definition of tune up (something) phrasal verb, verb from the Cambridge Academic Content Dictionary © Cambridge University Press)
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