Entry 1 sense Webster, 1913 Monopolist /(mō̇*nŏp"ō̇*lĭst)/ · Mo·nop·o·list · IPA /mənˈɑpələst/ 01 n. One who monopolizes; one who has a monopoly; one who favors monopoly. 1. One who monopolizes; one who has a monopoly; one who favors monopoly.