/ Dictionary / Index P positive caster: Meaning and Definition of Find definitions for: pos'itive cas'ter Pronunciation: [key] — Auto. Auto. See under(def. 6). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. positive positive column 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