two-toed sloth n 1: a sloth of Central America that has two long claws on each forefoot and three long claws on each hindfoot [syn: {two- toed sloth}, {unau}, {unai}, {Choloepus hoffmanni}] 2: relatively small fast-moving sloth with two long claws on each front foot [syn: {two-toed sloth}, {unau}, {unai}, {Choloepus didactylus}]