upside down


with the upper part undermost.
in or into complete disorder; topsy-turvy: The burglars turned the house upside down.

Origin of upside down

1300–50; re-formation (see upside) of Middle English upsedoun, earlier up so doun (see up, so1, down1; sense of so obscure)

Related forms

up·side-down, adjectiveup·side-down·ness, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for upside down

British Dictionary definitions for upside down

upside down


(usually postpositive; upside-down when prenominal) turned over completely; inverted
(upside-down when prenominal) informal confused; muddled; topsy-turvyan upside-down world


in an inverted fashion
in a chaotic or crazy manner

Derived Forms

upside-downness, noun

Word Origin for upside down

C16: variant, by folk etymology, of earlier upsodown
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012