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Definition of up–and–down
1 : marked by alternate upward and downward movement, action, or surface
2 : perpendicular
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First Known Use of up–and–down
circa 1755
UP–AND–DOWN Defined for Kids
up–and–down
play
adjective
\ˌəp-ənd-ˈdau̇n\
Definition of up–and–down for Students
1 : switching between upward and downward movement or action
2 : 1perpendicular 1 an up-and-down post
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