Entry 2 senses · 2 variants Webster, 1913 Signiorize · Sign·ior·ize · IPA v. t. v. i. 01 v. t. To exercise dominion over; to lord it over. 1. To exercise dominion over; to lord it over.[Obs.] 02 v. i. To exercise dominion; to seigniorize. 1. To exercise dominion; to seigniorize.[Obs.]