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Definitions

D-day

[dee-dey] / ˈdiˌdeɪ /
NOUN
target date
Synonyms
WEAK
A-day H-hour deadline target day term terminal date time allotment time frame zero hour
NOUN
zero hour
Synonyms
WEAK
A-day H-hour appointed hour climax contingency countdown crisis crisis point crossroad crossroads crunch time deadline emergency exigency jumping-off point juncture moment of truth pinch pivotal moment start time strait target target day the time turning point vital moment

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The naval island is where the Navy developed the Higgins boat — the pivotal landing craft that ferried troops to the beaches of Normandy during the D-day invasion.

From Los Angeles Times • Sep. 4, 2024

Alfie Booker still remembers the noises, smells and smoke from D-day.

From BBC • Jun. 5, 2024

James should have been part of the U.S. forces that invaded the beaches of Normandy, France, for D-day in June 1944.

From Los Angeles Times • Feb. 10, 2022

In late 2020, as Flash D-day drew near, supporters scrambled to rescue it.

From Slate • Feb. 5, 2021

The ministers argued among themselves that night—the evening before the march that James Bevel had called D-day.

From "While the World Watched: A Birmingham Bombing Survivor Comes of Age during the Civil Rights Movement" by Carolyn Maull McKinstry