/ Dictionary / Index F fiberglass: Meaning and Definition of Find definitions for: fi•ber•glass 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. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: fiberglass (Thesaurus) Fiberglas fiberize Related Content Daily Word Quiz: feline Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language