volte face

/ˈvɒlt fɑːs/
noun
  1. A complete change of opinion, position, or policy.
    • Her volte-face on the issue left her supporters confused and disappointed.
    • After months of opposition, the company did a complete volte-face and supported the new regulation.
    • The politician's sudden volte-face on the tax bill surprised everyone.
Antonyms