Added 10 October 2026 four-sided adjective Categories: Describing Words adjective ! Definition from WordNet 3.1, Princeton University. More about four-sided at Wordnik → Where our words come from → Having four sides. Related Words: many-sidedmultilateralquadrilateralfourfoldquadrangularquadrantsfourthsfoursquadruplefourpenny Back to today's word