from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A period of 30 minutes.
- n. The middle point of an hour: The clock chimes on the half-hour.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A period of time equal to thirty minutes.
- n. The time of thirty minutes past any particular hour.
from The Century Dictionary and Cyclopedia
- n. A period of thirty minutes.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a half of an hour
half- + hour (Wiktionary)