/ Dictionary / Index P potency: Meaning and Definition of Find definitions for: po•ten•cy Pronunciation: (pōt'n-sē), [key] — pl. -cies the state or quality of being potent. power; authority. efficacy; effectiveness; strength. capacity to be, become, or develop; potentiality. a person or thing exerting power or influence. See(def. 2). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: potency (Thesaurus) potence potent Related Content Daily Word Quiz: opulent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language