/ Dictionary / Index C chase mortise: Meaning and Definition of Find definitions for: chase' mor"tise Pronunciation: [key] a mortise having one inclined narrow side. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. chase chaser Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language