volte-face
Concise Oxford English Dictionary © 2008 Oxford University Press:
volte-face /vɒltˈfas, -ˈfɑːs/
▶noun
- 1 an act of turning round so as to face in the opposite direction.
- 2 an abrupt and complete reversal of opinion or position.
– origin C19: from Fr., from Ital. voltafaccia, based on L. volvere ‘to roll’ + facies ‘appearance, face’.
'volte-face' also found in these Oxford entries:

