D-Day

noun

ˈdē-(ˌ)dā 

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

Among them are places travelers have been visiting for decades, including the D-Day beaches of Normandy, Greece’s Mount Olympus, and the blue-and-white Tunisian village of Sidi Bou Saïd. — Bailey Berg, Forbes.com, 9 Aug. 2026

Based on a true story, the weather thriller tackles the intense days leading up to D-Day. — Brian Truitt, USA Today, 24 July 2026

Lingering French gratitude is evident in the various museums honoring the D-Day landings. — Eliot A. Cohen, The Atlantic, 9 July 2026

The franchise went on to explore World War One, Hitler, Stalin and D-Day among other topics. — Melanie Goodfellow, Deadline, 16 June 2026

Word History

Etymology

D, abbreviation for day

First Known Use

1918, in the meaning defined above

Rhymes for D-Day

• acetazolamide
• polyacrylamide
• acrylamide
• cyanamide
• procainamide
• sulfonamide
• sulphonamide
• amide
• nicotinamide
• sulfanilamide