/ Dictionary / Index A Advent Sunday: Meaning and Definition of Find definitions for: Ad'vent Sun'day Pronunciation: [key] the first Sunday in Advent. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. adventive adventure Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language