/ Dictionary / Index P poli sci: Meaning and Definition of Find definitions for: pol•i sci Pronunciation: (pol'ē sī'), [key] — Informal. Informal. political science: to major in poli sci. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Polisario polish Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language