What is "about turn"

alt. 1 (context British military English) Of a formation of soldiers, to reverse the direction in which they are facing; an about face. (First attested in the mid 20^th century.)(R:SOED5: page=7) 2 (context British figuratively idiomatic English) A complete change of opinion, direction, etc. (First attested in the mid 20^th century.) n. 1 (context British military English) Of a formation of soldiers, to reverse the direction in which they are facing; an about face. (First attested in the mid 20^th century.)(R:SOED5: page=7) 2 (context British figuratively idiomatic English) A complete change of opinion, direction, etc. (First attested in the mid 20^th century.) vb. (context intransitive military English) To turn to face the opposite direction. (First attested in the mid 20^th century.)

n. act of pivoting 180 degrees, especially in a military formation [syn: about-face]