1. a material consisting of extremely fine filaments of glass that are combined in yarn and woven into fabrics, used in masses as a thermal and acoustical insulator, or embedded in various resins to make boat hulls, fishing rods, and the like. verb (used with object)
2. to cover or form with fiberglass. verb (used without object)
3. to use or work with fiberglass.
"businesses can be fiberglass."
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