What is the meaning of the word "zero hour"?
Definitions:
-
The moment when an important or decisive event is set to begin.
NOUN
- After months of preparation, zero hour for the product launch had arrived.
- After months of preparation, zero hour for the product launch had arrived.
-
The scheduled or actual time at which a significant operation begins, especially a military attack. NOUN
- Troops were instructed to move at zero hour.
- Troops were instructed to move at zero hour.