Meaning & use
insulator
A material or device that does not conduct electricity, heat, or sound, used to prevent its transfer or loss.
See it in a sentence
Rubber is a common insulator used to coat electrical wires safely.
Thick walls act as insulators, helping to keep the house cool in summer.
A note on using this word
Different materials insulate against different things; a good electrical insulator is not always a good sound one.
Words with a similar meaning
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Words with an opposite meaning
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