Dictionary![]() ![]() up-and-downPronunciation: (up'un-doun'), [key] —adj. 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. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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