Pronunciation: (fī'bur-glas", -gläs"),[key] —n. 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.
—v.t. to cover or form with fiberglass.
—v.i. to use or work with fiberglass. Also,fi'ber glass".