if a group of musicians tune up, they make small changes to their instruments so that they can play well together
same as tune
to prepare for an event or a situation
Bending forward, listening closely, he began to tune up the machine heads.
He was in the next room, tuning up his guitar.
The team is tuning up for another busy season.
tunes up
tuning up
tuned up
There is no origin for this phrasal verb
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