[uhp-uh n-doun]
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  1. moving alternately up and down: the up-and-down swing of levers; an up-and-down tune.
  2. having an uneven surface: up-and-down countryside.
  3. changeable: up-and-down luck.
  4. perpendicular or nearly so: a straight up-and-down hillside.

Origin of up-and-down

First recorded in 1610–20
Related formsup-and-down·ness, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for up-and-down

perpendicular, seesaw, uneven, vacillating, vertical, bobbing, yoyo

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British Dictionary definitions for up-and-down


  1. moving, executed, or formed alternately upwards and downwards
  2. mainly US very steep; vertical
adverb, preposition up and down
  1. backwards and forwards (along)
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