'zero hour' definitions:
Definition of 'zero hour'
(from WordNet)
noun
The time set for the start of an action or operation
Synonyms of 'zero hour'
From: Moby Thesaurus
- A-day,
- charged moment,
- contingency,
- crisis,
- critical moment,
- crossroads,
- crucial moment,
- D day,
- deadline,
- decisive moment,
- eleventh hour,
- emergency,
- exigency,
- H hour,
- kairos,
- kairotic moment,
- moment of truth,
- nick of time,
- pass,
- pinch,
- pregnant moment,
- psychological moment,
- strait,
- target date,
- target day,
- turning point