up–and–down

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adjective \ˌəp-ən(d)-ˈdau̇n, ˌəp-əm-\

Definition of up–and–down

  1. 1 :  marked by alternate upward and downward movement, action, or surface

  2. 2 :  perpendicular

First Known Use of up–and–down

circa 1755


UP–AND–DOWN Defined for Kids

up–and–down

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adjective \ˌəp-ənd-ˈdau̇n\

Definition of up–and–down for Students

  1. 1 :  switching between upward and downward movement or action

  2. 2 :  1perpendicular 1 an up-and-down post

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