# insulator

> English word · Noun · IPA /ˈɪn.s(j)ə.leɪ.tə(ɹ)/ · frequency rank #39,864

## Definitions
1. A substance that does not transmit heat (thermal insulator), sound (acoustic insulator) or electricity (electrical insulator).
2. A non-conductive structure, coating or device that does not transmit sound, heat or electricity (see image)
3. A person who installs insulation.

## Etymology
From insulate + -or.

## Easily confused with
- **insular** (https://plainspell.com/en/vs/insular-vs-insulator)
- **insulate** (https://plainspell.com/en/vs/insulate-vs-insulator)
- **insulated** (https://plainspell.com/en/vs/insulated-vs-insulator)
- **incubator** (https://plainspell.com/en/vs/incubator-vs-insulator)
- **insulation** (https://plainspell.com/en/vs/insulation-vs-insulator)

## Common misspellings (13)
`innsulator`, `insluator`, `inssulator`, `insualtor`, `insulaotr`, `insulatorr`, `insulatro`, `insulattor`, `insullator`, `insultaor`, `inuslator`, `isnulator`, `nisulator`

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/insulator