Definition from Wiktionary, the free dictionary
From the imperative phrase used in the military.
- A turn of 180 degrees, typically in a military formation.
- Total reversal of opinion or attitude.
2011 November 10, Jeremy Wilson, “England Under 21 5 Iceland Under 21 0: match report”, Telegraph:
- A sell-out crowd of 10,000 then observed perfectly a period of silence before the team revealed their black armbands, complete with stitched-in poppies, for the match. After Fifa’s about-turn, it must have been a frantic few days for the England kit manufacturer. The on-field challenge was altogether more straightforward.
total reversal of opinion or attitude
- (intransitive) To turn 180 degrees, typically in a military formation.