variants or 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

Examples of D-Day in a Sentence

Recent Examples on the Web
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The production design team re-created the famous D-day map from the Allied headquarters in Southwark House. Emily Zemler, Los Angeles Times, 29 May 2026 Colleville-sur-Mer is where 10,000 U.S. soldiers killed on D-Day and in the ensuing days are buried under row upon row of white crosses gleaming in the sun. Peter Lucas, Boston Herald, 25 May 2026 The opening act will include a Douglas C-47 Skytrain — the aircraft that dropped paratroopers over Normandy on D-Day — and the Air Force’s Wings of Blue parachute team. Sally Krutzig, Idaho Statesman, 14 May 2026 During his first year at the University of Florida, after the Allied force’s D-Day invasion of Normandy in late 1944, he was drafted to serve in World War II after the Battle of the Bulge. Howard Cohen, Miami Herald, 15 Apr. 2026 See All Example Sentences for D-Day

Word History

Etymology

D, abbreviation for day

First Known Use

1918, in the meaning defined above

Time Traveler
The first known use of D-Day was in 1918

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Cite this Entry

“D-Day.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/D-Day. Accessed 5 Jun. 2026.

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