about-face
Pronunciation:
/əˈbaʊtˌfeɪs/noun
Definitions
An abrupt turn to face the opposite direction.
Example: The soldier did an about-face and marched off.
A reversal in direction; reversal of attitude or opinion.
Example: When Luke heard the news, he did an abrupt about-face on the policy.
verb
Definitions
To turn 180 degrees to face the opposite direction
Example: The soldiers would about-face immediately after the order was given.
To change opinion or attitude drastically.
Example: A politician will about-face at the drop of a hat if he thinks there are votes in it.