ALL meanings of zero hour
ze·ro hour
Z z - noun zero hour the time set for the beginning of a military attack or operation. 1
- noun zero hour the time set for the beginning of any event or action. 1
- noun zero hour a decisive or critical time. 1
- noun zero hour The scheduled time for the start of some event, especially a military operation; H-hour. 0
- noun zero hour the time set for the start of an attack or the initial stage of an operation 0
- noun zero hour a critical time, esp at the commencement of an action 0
- noun zero hour the hour or moment at which a military attack or other important operation is to begin 0
- noun zero hour any crucial or decisive moment 0