/ Dictionary / Index E equivalency: Meaning and Definition of Find definitions for: e•quiv•a•len•cy Pronunciation: (i-kwiv'u-lun-sē), [key] — pl. -cies. equivalence (defs. 1, 2). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. equivalence relation equivalent Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language