Breadcrumb Home > Dictionary > Index P partisanism: Meaning and Definition of Find definitions for: par•ti•san•ism Pronunciation: (pär'tu-zu-niz"um, -su-), [key] — n. partisan action or spirit. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. partisan partita ✖ Related Content Daily Word Quiz: nabob Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language