1. [syn: D-day, 6 June 1944]
The Collaborative International Dictionary of English v.0.48:
D-day \D-day\ n.
1. (Mil.) the day designated for the beginning of a planned
attack by a military force; in communications the day is
often otherwise unspecified for security reasons; as, the
day before D-day the troops will move into position.
2. 6 June 1944, the day of the landing in France, by troops
allied against the Germans in World War II.
Syn: 6 June 1944.
3. the day for commencement or execution of any elaborate
planned activity; -- often used jocosely. [informal]
WordNet (r) 3.0 (2006):
n 1: date of the Allied landing in France, World War II [syn:
D-day, 6 June 1944]