any of a group of transparent, thermoplastic polymeric resins derived from acrylic acid, methacrylic acid, or their esters, or from acrylonitrile: used in making molded plastics, paints, textile fibers, etc.
See acrylic resin in American Heritage Dictionary 4
noun
Any of numerous thermoplastic or thermosetting polymers or copolymers of acrylic acid, methacrylic acid, esters of these acids, or acrylonitrile, used to produce paints, synthetic rubbers, and lightweight plastics.