d-day
IPA: dˈideɪ
Root Word: D-Day
noun
- (historical) 6 June 1944, the date when the Allies invaded western Europe in World War II.
- (figuratively, chiefly military) The date of any major event planned for the future.
- Alternative letter-case form of D-Day [(historical) 6 June 1944, the date when the Allies invaded western Europe in World War II.]