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.

Ronald Reagan gave perhaps the most famous Normandy speech on the 40th anniversary of D-Day in 1984, now remembered as “The Boys of Pointe du Hoc.”

From Salon • Jun. 9, 2026

Around the anniversary of the D-Day invasion on June 6, the whole place turns into a love-fest for America.

From Salon • Jun. 9, 2026

Archaeologists working on the “Greek Desk” uncovered Nazi secrets, sabotaged enemy infrastructure and helped prepare for D-Day.

From The Wall Street Journal • Jun. 2, 2026

Stan Drew, from Penarth, Vale of Glamorgan, was killed on the Normandy beaches on 24 July 1944, in the months following D-Day.

From BBC • May 25, 2026

It even turned out to be crucial for the D-Day invasions.

From "The Woman All Spies Fear" by Amy Butler Greenfield

D-day

Example Sentences

Related Words