turquoise UK /ˈtɜː(ɹ).k(w)ɔɪz/US /ˈtɝ.k(w)ɔɪz/adjective 2noun 2forms 3 adjective2 •Having a pale greenish-blue colour. •Made of turquoise (the gemstone). noun2 •A sky-blue, greenish-blue, or greenish-gray semi-precious gemstone. •A pale greenish-blue colour, like that of the gemstone. formsturquoises · more turquoise · most turquoise