D-day Hear it!

D-day definition

D·-day or D-Day (dē′dā′)

noun

the day on which a military attack or other important event is to take place; specif., June 6, 1944, the day of the invasion of W Europe by Allied forces in WWII

Etymology: D, the first letter of day

Webster's New World College Dictionary Copyright © 2005 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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