(used as a military command to perform an about-face).
—n., v., -faced, -fac•ing.
a turn of 180° from the position of attention.
a complete, sudden change in position, direction, principle, attitude, etc.: They've done an about-face in their foreign policy.
to execute an about face.
to turn in the opposite direction.
to switch to an opposite opinion.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.