polyester /ˈpɑliˌɛstə(r)/adjective 2noun 2forms 1 adjective2 •Of, or consisting of polyesters. •(disapproving) Low quality or inauthentic; produced with minimal effort.Her short stout body was packed into pale pink polyester pants and a matching buttonfront vest. — 1988 noun2 •Any polymer whose monomers are linked together by ester bonds •A material or fabric made from polyester polymer formspolyesters