To retrace one's steps.
To exercise a racehorse around the racetrack in the opposite direction to that in which races are run.
To taxi down an active runway in the opposite direction to that being used for takeoff.
To repeat or review work already done.
the act of backtracking
To hand over (something to someone), place into the care or control of another.
To quit (a job or position).
To submit passively; to give up as hopeless or inevitable.
To give up; to relinquish ownership of.