/ Dictionary / Index H halfhourly: Meaning and Definition of Find definitions for: half•hour•ly Pronunciation: (haf'our'lē, -ou'ur-, häf'-), [key] — adj. half-hour (def. 3). occurring every half-hour: a halfhourly interruption. —adv. at half-hour intervals: The bell rang halfhourly. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. half-hour halfies Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language