1. any of numerous synthetic resins; they are light and strong and weather resistant;
2. a complex ester used for making fibers or resins or plastics or as a plasticizer;
3. any of a large class of synthetic fabrics;
WordNet (r) 3.0 (2006):
polyester
n 1: any of numerous synthetic resins; they are light and strong
and weather resistant
2: a complex ester used for making fibers or resins or plastics
or as a plasticizer
3: any of a large class of synthetic fabrics