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Definition of fiberglass

fiberglass

/ˈfaɪbərˌɡlæs/
(UK: fibreglass)
fi · ber · glass
Plural:fiberglasses
•
Past Simple:fiberglassed
•
Past Participle:fiberglassed
•
Present Participle:fiberglassing
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fiberglass Lexical Profile

fiberglass Game Scores & Validity

• noun

1

American A strong, lightweight material consisting of fine glass fibers embedded in a resin matrix, commonly used in construction, automotive, and marine manufacturing.

Example

"The boat builder repaired the damaged hull using several layers of fiberglass and epoxy."

Synonyms
View all synonyms for fiberglass

• verb

1

American To coat, reinforce, or repair a surface or structure using fiberglass.

Example

"They decided to fiberglass the exterior of the wooden canoe to make it completely waterproof and durable."

Synonyms
View all synonyms for fiberglass

• Nearby Words

fiberboard
fibered
fiberfill
fiberglass
fiberless
fiberlike
fibroid

Word Origin & Etymology

Coined in the late 1930s as a trademark (Fiberglas) by the Owens-Corning company, formed by combining 'fiber' and 'glass'. It eventually became a generic term for glass-reinforced plastic.

Usage Trend

Historical frequency of usage in published text.

180019102020
Data source: Google Books Ngram Viewer

Cite this Entry

Wordmom. (2026). Definition of Fiberglass. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/fiberglass
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