/ Dictionary / Index H Holy Innocents' Day: Meaning and Definition of Find definitions for: Ho'ly In'nocents' Day" Pronunciation: [key] December 28, a day of religious observance commemorating the slaughter of the children of Bethlehem by Herod's order. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Holyhead Island Holy Island Related Content Daily Word Quiz: resilient Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language