D-day
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About Our Definitions: All forms of a word (noun, verb, etc.) are now displayed on one page.D–day
nounDefinition of D-DAY
: a day set for launching an operation; specifically : June 6, 1944, on which Allied forces began the invasion of France in World War II
See Origin of D-DAY
D, abbreviation for day
First Known Use: 1918
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