Meaning & use
insulation
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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