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D-Day Line breaks: D-Day
Pronunciation: /ˈdiːdeɪ/

Definition of D-Day in English:


1The day (6 June 1944) in the Second World War on which Allied forces invaded northern France by means of beach landings in Normandy.
Example sentences
  • This weekend, the world will remember the courage and sacrifice of the Allied troops at the D-Day landings in France.
  • The raid also had a major influence on the success of the Allied troop landings on the Normandy beaches on D-Day a year later.
  • In the days following the D-Day landings, Allied troops carved a tenuous foothold on the coast of Normandy.
1.1The day on which an important operation is to begin or a change to take effect: Powell embarks on a publicity blitz that promises to be the D-day of author tours
More example sentences
  • Inside Out follows residents on their fight with officialdom as the final countdown to D-Day begins.
  • Rehearsals began in October gathering in frequency and intensity as D-Day approaches.
  • Once we got everything we picked a day and that day will go into the history books as our personal D-Day: 29th of June 2003.


From D for day + day. Compare with H-hour.

Definition of D-Day in:
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