Meaning of upshift

up•shift

Pronunciation: (up'shift"), [key]
— v.i.
  1. to shift an automotive transmission or vehicle into a higher gear.
—v.t.
  1. to shift (an automotive transmission or vehicle) into a higher gear.
—n.
  1. an act or instance of upshifting.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.