Definition of polyester noun from the Oxford Advanced American Dictionary

 

polyester

 noun
noun
NAmE//ˌpɑliˈɛstər//
 
[uncountable]
 
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a strong material made of fibers (called polyesters) that are produced by chemical processes, often mixed with other materials and used especially for making clothes a cotton and polyester shirt
See the Oxford Advanced Learner's Dictionary entry: polyester