1 : forming or capable of forming or molding or fashioning; "a formative influence"; "a formative experience"; "the plastic forces of nature"
2 : capable of being molded or modeled (especially of earth or clay or other soft material); "plastic substances such as wax or clay"
nom
1 : a card (usually plastic) that assures a seller that the person using it has a satisfactory credit rating and that the issuer will see to it that the seller receives payment for the merchandise delivered