down•shiftPronunciation: (doun'shift"), [key]
to shift an automotive transmission or vehicle into a lower gear.
to become less active; slow down: The economy seems to be downshifting.
to shift (an automotive transmission or vehicle) into a lower gear.
an act or instance of downshifting.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.