/ Dictionary / Index H Hilarius: Meaning and Definition of Find definitions for: Hi•lar•i•us Pronunciation: (hi-lâr'ē-us), [key] — n. died a.d. 468, pope 461–468. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hilarity Hilary Related Content Daily Word Quiz: stringent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language