/ Dictionary / Index M mortise block: Meaning and Definition of Find definitions for: mor'tise block" Pronunciation: [key] a block having a shell cut from a single piece of wood. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mortise mortise chisel Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language