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单词 zero hour
释义

zero hour

SEE SYNONYMS FOR zero hour ON THESAURUS.COM

noun

the time set for the beginning of a military attack or operation.
the time set for the beginning of any event or action.
a decisive or critical time.

Origin of zero hour

First recorded in 1915–20

Words nearby zero hour

zero-divisor, zero-emission, zero-emission vehicle, zero gravity, zero grazing, zero hour, zero in, zero in on, zero option, zero-point energy, zero population growth
Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for zero hour

zero hour

noun

military the time set for the start of an attack or the initial stage of an operation
informal a critical time, esp at the commencement of an action
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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