IdiomBody & SensesEnglish

do an about-face

Meaning: To change one's behavior or mind abruptly and (often) apparently without reason.

Example: “The senator did an about-face and voted for the bill he had criticized.”

Equivalents in other languages

Origin: From the military command "About face!" ordering a soldier to turn to face the opposite direction. The figurative sense of a complete reversal of opinion or policy is found from the 19th century.

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