variants
or British fibreglass
ˈfaɪbɚˌglæs 
British ˈfaɪbəˌglɑːs
: a light and strong material that is made from thin threads of glass and that is used in making various products
—often used before another noun
a fiberglass boat
Cite this Entry
“Fiberglass.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/fiberglass. Accessed 15 Apr. 2026.
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