/ Dictionary / Index P polypharmacy: Meaning and Definition of Find definitions for: pol•y•phar•ma•cy Pronunciation: (pol"ē-fär'mu-sē), [key] — n. Pharm. the use of two or more drugs together, usually to treat a single condition or disease. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. polyphagia polyphase Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language