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

Example Sentences

See Examples For:

fiberglass

For decades, the company has been recognized for its mascot, a pink panther that matches the color of its signature bright pink fiberglass insulation.

From The Wall Street Journal ● Jun. 29, 2026

Though the Model A’s will surely raise eyebrows on the road, the caravan’s most startling element is the fiberglass bull representing the Amarillo-based Big Texan Steak Ranch restaurant, one of the event’s sponsors.

From Los Angeles Times ● Jun. 6, 2026

But seeing Chicken Boy is its own reward, especially after seeing so many of his fiberglass cousins.

From Los Angeles Times ● May 12, 2026

The district, leaning hard into Route 66’s centenary this year, is marked by five Muffler Men, 20-plus-foot-tall fiberglass statues.

From The Wall Street Journal ● Apr. 24, 2026

“Can’t you cut one out of the fiberglass from the Windsurfer mast?”

From "Adrift" by Paul Griffin