Definition of fiberglass
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
From the M-W Editors
First Known Use of fiberglass
1937
fiberglass
Definition of fiberglass
transitive verb
: to protect or repair by applying fiberglass
First Known Use of fiberglass
1967
FIBERGLASS Defined for English Language Learners
fiberglass
playDefinition of fiberglass for English Language Learners
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: a light and strong material that is made from thin threads of glass and that is used in making various products
FIBERGLASS Defined for Kids
fiberglass
playDefinition of fiberglass for Students
: glass in the form of fibers used in various products (as filters and insulation)
Learn More about fiberglass
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See words that rhyme with fiberglass Spanish Central: Translation of fiberglass Nglish: Translation of fiberglass for Spanish speakers Britannica.com: Encyclopedia article about fiberglass
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