noun, verb ·Uncommon ·Advanced level

Definitions

Noun

1. 1
   Silica based glass extruded into fibers that possess a length at least 1000 times greater than their width. UK, uncountable, usually
2. 2
   a covering material made of glass fibers in resins wordnet
3. 3
   Ellipsis of fibreglass wool. UK, abbreviation, alt-of, ellipsis, uncountable, usually
4. 4
   A composite material made from fine fibres of spun glass held together with resin. UK, ellipsis, uncountable, usually

Verb

1. 1
   To apply fibreglass to. UK

   "to fibreglass the hull of a fishing boat"

Synonyms

All synonyms

fiberglassfiberglassfiberglass woolfiberglass-reinforced plasticfibreglass reinforced plasticfibreglass wool

Example

More examples

"Hirofumi installed fibreglass insulation in the ceiling."

Etymology

Compound of fibre + glass.

Related phrases

composite materialglass fibre

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.