(chemistry) A polymer (such as polyethylene) made by the polymerization of an olefin
(organic compound) A polymer consisting of many ethylene monomers bonded together; used for kitchenware, containers etc.
(chemistry) A polyene
a lightweight thermoplastic; used especially in packaging and insulation
A polyolefin is a type of polymer with the general formula (CH2CHR)n. They are derived from a handful of simple olefins (alkenes).
Polyethylene or polythene (abbreviated PE; IUPAC name polyethene or poly(methylene)) is the most common plastic in use today. It is a polymer, primarily used for packaging (plastic bags, plastic films, geomembranes and containers including bottles, etc.).