[n] generic name for certain synthetic or semisynthetic materials that can be molded or extruded into objects or films or filaments or used for making e.g. coatings and adhesives
[adj] capable of being molded or modeled (especially of earth or clay or other soft material); "plastic substances such as wax or clay"
[adj] used of the imagination; "material...transformed by the plastic power of the imagination" (Coleridge)
[adj] capable of being influenced or formed; "the plastic minds of children"; "a pliant nature"