Entry 1 sense Webster, 1913 Quadruply · Quad·ru·ply · IPA 01 adv. To a fourfold quantity; so as to be, or cause to be, quadruple; as, to be quadruply recompensed. 1. To a fourfold quantity; so as to be, or cause to be, quadruple; as, to be quadruply recompensed.