Definition of upside down

Definition of upside down
  1. upside down Adverb Inverted, so that the top is now at the bottom
  2. upside down Adverb In great disorder
  3. upside down Adjective Inverted; turned so that the top is at the bottom.
  4. upside down Adjective Owing more money for something than it is worth; having negative equity.
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