C1nounsciencetechnology
US/ˈɪn.sə.leɪ.tər/
UK/ˈɪn.sjʊ.leɪ.tə/
a material that does not let electricity, heat or sound pass through it easily
In context
Rubber is a good insulator, so electricians wear rubber gloves.
Air trapped in the foam makes it an excellent insulator against cold.
Glass acts as an insulator on high-voltage power lines.
Words that go with insulator
adjective + noun
- good insulatorWool is a good insulator in winter clothing.
- electrical insulatorPlastic is widely used as an electrical insulator.
- poor insulatorMetal is a poor insulator of heat.
- thermal insulatorFoam board serves as a cheap thermal insulator.
verb + preposition
- act as an insulatorThe thick layer of fat acts as an insulator for whales.
noun + preposition
- insulator againstSnow is a natural insulator against freezing air.