Meaning & use

insulation

noun·Academic

Material used to prevent heat, sound, or electricity from passing through, or the process of adding such material.

See it in a sentence

Thick insulation in the attic keeps the house warm during winter.

The electrician checked that the wire's insulation had not worn through.

A note on using this word

Applies to physical materials that block heat, sound, or electric current, and also names the general process.

Words with a similar meaning

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