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(Military) a military command to a formation of men to reverse the direction in which they are facing
a complete change or reversal, as of opinion, attitude, direction, etc
(intr) to perform an about-turn
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014