zero hour

zero hour

n. The scheduled time for the start of an operation or action, especially a combat operation of great size. Also called H-hour.

zero hour

n 1. (Military) military the time set for the start of an attack or the initial stage of an operation 2. informal a critical time, esp at the commencement of an action

ze′ro hour`

n. 1. the time set for the beginning of a military attack or operation. 2. the time set for the beginning of any event or action. 3. a decisive or critical time. [1915–20]

Thesaurus

Noun

1.

zero hour - the time set for the start of an action or operationtime of day, hour - clock time; "the hour is getting late"

zero hour

noun moment of truth, crisis, turning point, vital moment, appointed hour, moment of decision Your zero hour has arrived.

zero hour

nounA decisive point:climacteric, crisis, crossroad (used in plural), exigence, exigency, head, juncture, pass, turning point.

Translations

ora zero