shift up
phrasal verbPart ofshift
shift up — phrasal verb
1. to change to a higher gear in a vehicle so that it can go faster.
1.phrasal verb
Definition
to change to a higher gear in a vehicle so that it can go faster.
Example
As the motorway opened up ahead, Élise shifted up and the car picked up speed quickly.
The instructor reminded the student to shift up once the engine reached three thousand revs.