zero hour

noun
UK: /ˈzɪərəʊ ˈaʊər/
US: /ˈzɪroʊ ˈaʊər/

  1. The time when something important is planned to start.

    1. The zero hour for the attack was set for dawn.
    2. We are approaching zero hour for the implementation of the new policies.

  2. A critical moment when success or failure is decided.

    1. It's zero hour for the negotiations, a solution must be found soon.
    2. This is zero hour for the company, if sales don't improve, we'll go bankrupt.

Synonyms

deadline d-day moment of truth critical point

Frequently Asked Questions

The word "zero hour" in English means: The time when something important is planned to start., A critical moment when success or failure is decided..

The phonetic transcription of "zero hour" is /ˈzɪərəʊ ˈaʊər/ in British English and /ˈzɪroʊ ˈaʊər/ in American English. Click the 🔊 button to hear both pronunciations.

Synonyms for "zero hour": deadline, d-day, moment of truth, critical point.

Example usage of "zero hour": "The zero hour for the attack was set for dawn.". More examples on the page.