ˈkoʊpi.əs ˈtɔːt͡ʃuːəs ˈtɔɹt͡ʃuəs ˈtwɪstɪŋ vəˈl(j)uː.mɪ.nəs vəˈlu.mə.nəs ˈwaɪndɪŋ large in number or quantity (especially of discourse) she took copious notes a subject of voluminous legislation large in volume or bulk a voluminous skirt marked by repeated turns and bends a tortuous road up the mountain winding roads are full of surprises had to steer the car down a twisty track