/ Dictionary / Index H H-hour: Meaning and Definition of Find definitions for: H-hour Pronunciation: (āch'our", -ou"ur), [key] — n. the time, usually unspecified, set for the beginning of a planned attack. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. H-hinge HHS Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language