/ Dictionary / Index A Ascension Day: Meaning and Definition of Find definitions for: Ascen'sion Day" Pronunciation: [key] the 40th day after Easter, commemorating the Ascension of Christ; Holy Thursday. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ascension ascensive Related Content Daily Word Quiz: devout Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language