Etymology
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upside down (adv.)

late 15c., earlier upsadoun (late 14c.), up so down (c. 1300); the so perhaps meaning "as if." As an adjective from 1866.

updated on March 03, 2014

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Dictionary entries near upside down

uproot

upscale

upset

upshot

upside

upside down

upsilon

upskirt

upstage

upstairs

upstanding