Definitions for zero hour

This page provides all possible meanings and translations of the word zero hour

Random House Webster's College Dictionary

ze′ro hour`(n.)

  1. the time set for the beginning of a military attack or operation.

    Category: Common Vocabulary, Military

  2. the time set for the beginning of any event or action.

    Category: Common Vocabulary

  3. a decisive or critical time.

    Category: Common Vocabulary

Origin of zero hour:


Princeton's WordNet

  1. zero hour(noun)

    the time set for the start of an action or operation


  1. zero hour(Noun)

    The scheduled time for the start of some event, especially a military operation; H-hour


  1. Zero Hour!

    Zero Hour! is a 1957 drama film directed by Hall Bartlett from a screenplay by Arthur Hailey, Hall Bartlett and John Champion. It stars Dana Andrews, Linda Darnell and Sterling Hayden and features Peggy King, Elroy "Crazy Legs" Hirsch, Geoffrey Toone and Jerry Paris in supporting roles. The film was released by Paramount Pictures. Zero Hour! was an adaptation of Hailey's original 1956 Canadian Broadcasting Corporation teleplay Flight into Danger. Hailey also co-wrote a novel with John Castle based on the same plot, titled Flight Into Danger: Runway Zero-Eight.


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