Definition of "d-day" [d-day]

• Date of the Allied landing in France, World War II (noun)

WordNet. Princeton University. 2010.

• "Listed below are links to weblogs that reference d-day:"
• "Two weeks after d-day, we were the fighter squadron on a strip that was built there after a bad day attack on this German Panzer division, seeing innocent civilians massacred."
• "You'd have to wait for that to grow out so if you're sentenced to the guillotine, you can be certain you'll look your very best on d-day."