Wiktionary
about-turn
n. 1 A turn of 180 degrees, typically in a military formation. 2 Total reversal of opinion or attitude. vb. (context intransitive English) To turn 180 degrees, typically in a military formation.
Usage examples of "about-turn".
Now Gleed ordered an about-turn and followed it with a take-him gesture.
Ruth, yet for some reason caused Paulie to do an abrupt about-turn and start to feel a little sorry for this officedog, so out of place here with her painted nails and vivid lips and tailored jacket and pelmet microskirt, all in cerise and taupe, and too-thin thighs encased in charcoal tights.