fi·ber·glass
ˈfī-bər-ˌglas 
1
: glass in fibrous form used in making various products (such as glass wool for insulation)
2
: a composite structural material of plastic and fiberglass
fiberglassed; fiberglassing; fiberglasses
: to protect or repair by applying fiberglass
Examples of fiberglass in a Sentence
Recent Examples on the Web
Melissa Minton, Architectural Digest, 10 Mar. 2026
Each mattress meets strict environmental standards and is made without fiberglass, formaldehyde or heavy metals.
—Tory Johnson, ABC News, 7 Mar. 2026
Melissa Repko, CNBC, 15 May 2025
Many mattress manufacturers switched to fiberglass as an alternative.
—Anna Giorgi, Verywell Health, 3 Sep. 2024
See All Example Sentences for fiberglass
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Noun
Pergola kits tend to be for fiberglass or metal pergolas made of slimmer, lightweight materials like aluminum.
—Melissa Minton, Architectural Digest, 10 Mar. 2026
Each mattress meets strict environmental standards and is made without fiberglass, formaldehyde or heavy metals.
—Tory Johnson, ABC News, 7 Mar. 2026
Verb
Suppliers have shifted from materials like aluminum, which faces tariffs, to fiberglass.
—Melissa Repko, CNBC, 15 May 2025
Many mattress manufacturers switched to fiberglass as an alternative.
—Anna Giorgi, Verywell Health, 3 Sep. 2024
See All Example Sentences for fiberglass
Cite this Entry
“Fiberglass.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fiberglass. Accessed 11 Mar. 2026.
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