Definition of one-eighty in English:

one-eighty

Line breaks: one-eighty

noun

informal , chiefly US
  • 1A turn to face in the opposite direction: I sat in front of them, turning my desk in a one-eighty
  • 1.1A complete reversal in attitude or opinion: her personality did a one-eighty and she was back to being sweet and caring

Origin

1920s: a spelling of 180 degrees.

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