/ Dictionary / Index P polymorphous: Meaning and Definition of Find definitions for: pol•y•mor•phous Pronunciation: (pol"ē-môr'fus), [key] — adj. having, assuming, or passing through many or various forms, stages, or the like. polymorphic. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: polymorphous (Thesaurus) polymorphonuclear polymyalgia rheumatica Related Content Daily Word Quiz: furtive Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language