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zero hour

 
Dictionary: 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.


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Thesaurus: zero hour
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noun

    A decisive point: climacteric, crisis, crossroad (used in plural), exigence, exigency, head, juncture, pass, turning point. See decide/hesitate.

US Military Dictionary: zero hour
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The time at which a planned operation, typically a military one, is set to begin.

See the Introduction, Abbreviations and Pronunciation for further details.

WordNet: zero hour
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Note: click on a word meaning below to see its connections and related words.

The noun has one meaning:

Meaning #1: the time set for the start of an action or operation


Wikipedia: Zero Hour
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Zero Hour may refer to:

In gaming:

In music:

In television:

In other fields:

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Copyrights:

Dictionary. The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.  Read more
Thesaurus. Roget's II: The New Thesaurus, Third Edition by the Editors of the American Heritage® Dictionary Copyright © 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.  Read more
US Military Dictionary. The Oxford Essential Dictionary of the U.S. Military. Copyright © 2001, 2002 by Oxford University Press, Inc. All rights reserved.  Read more
WordNet. WordNet 1.7.1 Copyright © 2001 by Princeton University. All rights reserved.  Read more
Wikipedia. This article is licensed under the Creative Commons Attribution/Share-Alike License. It uses material from the Wikipedia article "Zero Hour" Read more