/ Dictionary / Index M mordancy: Meaning and Definition of Find definitions for: mor•dan•cy Pronunciation: (môr'dn-sē), [key] — n. the quality of being mordant; sharpness. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mordacious mordant Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language