from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The scheduled time for the start of an operation or action, especially a combat operation of great size. Also called H-hour.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The scheduled time for the start of some event, especially a military operation; H-hour
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the time set for the start of an action or operation
Sorry, no etymologies found.