Upside Down Definition

So that the upper or right side is down.
Turned upside down.
American Heritage

In great disorder.

The thief had turned the room upside down.
Being or holding an asset that is worth less than its purchase price or the debt owed on it.
American Heritage

Inverted, so that the top is now at the bottom.

The Union flag was flying upside down, a sign of danger.
With the top side or part underneath or turned over; inverted.
Webster's New World
In disorder; topsy-turvy.
Webster's New World

Inverted; turned so that the top is at the bottom.

Would you like some of my upside down cake?
(finance) Owing more money for something than it is worth; having negative equity.
He's upside down on his mortgage.

Origin of Upside Down

  • Alteration of Middle English up so doun up as if down up up up so as if so1 doun down down1

    From American Heritage Dictionary of the English Language, 5th Edition

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upside down