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upside down

noun
1.
with the upper part undermost.
2.
in or into complete disorder; topsy-turvy:
The burglars turned the house upside down.
Origin
1300-1350
1300-50; re-formation (see upside) of Middle English upsedoun, earlier up so doun (see up, so1, down1; sense of so obscure)
Related forms
upside-down, adjective
upside-downness, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples for upsidedown
  • This is upsidedown, or the reverse of traditional practice.
British Dictionary definitions for upsidedown

upside down

adjective
1.
(usually postpositive; upside-down when prenominal) turned over completely; inverted
2.
(upside-down when prenominal) (informal) confused; muddled; topsy-turvy an upside-down world
adverb
3.
in an inverted fashion
4.
in a chaotic or crazy manner
Derived Forms
upside-downness, noun
Word Origin
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
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Word Origin and History for upsidedown

upside down

late 15c., earlier upsadoun (late 14c.), up so down (c.1300); the so perhaps meaning "as if."

Online Etymology Dictionary, © 2010 Douglas Harper
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