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countdown definition

☆ count·down (ko̵unt′do̵un′)

noun

the schedule of operations just before the firing of a rocket, the detonation of an explosive device, etc.; also, the counting off, in reverse order, of units of time in such a schedule

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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