start up
start up {v.}
1. To begin operating,
The driver started up the motor of the car.
The engine started up with a roar.
2. To begin to play (music).
The conductor waved his baton, and the band started up.
The orchestra started up a waltz.
Compare: STRIKE UP.
3. To rise or stand suddenly.
When he heard the bell, he started up from his chair.
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Source: A Dictionary of American Idioms
