Pronunciation: (haf'ouur', -ou'ur, häf'-), [key]
1. a period of 30 minutes.
2. the midpoint between the hours: The clock struck on the half-hour.
of, pertaining to, or consisting of a half-hour: half-hour programs.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.