fiberglass

American  

[fahy-ber-glas, -glahs] / ˈfaɪ bərˌglæs, -ˌglɑs /

Or fiber glass

noun

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.

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verb (used with object)

1. to cover or form with fiberglass.

verb (used without object)

1. to use or work with fiberglass.

fiberglass Scientific  

/ fī′bər-glăs′ /

1. A material made up of very fine fibers of glass. Fiberglass is resistant to heat and fire and is used to make various products, such as building insulation and boat hulls. Because the fibers in fiberglass are capable of transmitting light around curves, fiberglass is an important component of fiber optics.

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Etymology

Origin of fiberglass

An Americanism dating back to 1935–40; fiber + glass

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Example Sentences

See Examples For:

fiberglass

They placed a fish into a tank already occupied by another fish, with the two separated by a fiberglass mesh barrier and an opaque cover.

From Science Daily ● Oct. 18, 2026

Anchored to the sea floor, the fiberglass and steel device lies invisible below the water's surface.

From BBC ● Oct. 18, 2026

The technology itself isn’t magic—it’s chips and wires, fiberglass sheets with copper traces.

From The Wall Street Journal ● Oct. 1, 2026

The monument will be installed in a park in Callao, a nearby port city, after being coated with polyurethane foam and fiberglass, and finished with a marble dust.

From Barron's ● Sep. 26, 2026

When I took them off, both legs were just hollow fiberglass tubes.

From "Ugly" by Robert Hoge

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