crinoline /ˈkɹɪnəlɪn/ noun5 •A stiff petticoat made from this fabric. •A skirt stiffened with hoops. •A stiff fabric made from cotton and horsehair. •Netting placed around ships to guard against torpedoes. •Any of the hoops making up the framework used to support cladding over a boiler. formscrinolines