catamaran /ˌkæ.tə.məˈɹæn/ noun4 •A twin-hulled ship or boat. •(no longer used) A raft of three pieces of wood lashed together, the middle piece being longer than the others, and serving as a keel on which the rower squats while paddling. •(informal, no longer used) A quarrelsome woman; a scold.She meddles with my prescriptions for your wife; she doctors the infant in private: you'll never have a quiet house or a quiet wife as long as that old Catamaran is here. — 1889 •(no longer used) An old kind of fireship. formscatamarans