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 draw back; to draw up; to withdraw.
To avert (one's eyes or a gaze).
To decline or fail to do something promised; to break one's word.
To pull (something) back or back inside.
Of something said or written (such as published academic work): to take back or withdraw.
To draw (an extended body part) back into the body.
To take back or withdraw (something that has been said or written); to disavow, to repudiate.
Originally in chess and now in other games as well: to take back or undo (a move); specifically (card games) to take back or withdraw (a card which has been played).
To break or fail to keep (a promise, etc.); to renege.
To pronounce (a sound, especially a vowel) farther to the back of the vocal tract.
To cancel or take back (something, such as an edict or a favour or grant previously bestowed); to rescind, to revoke.