insulator

play
noun in·su·la·tor \ˈin(t)-sə-ˌlā-tər\

Definition of insulator

  1. :  one that insulates: as a :  a material that is a poor conductor (as of electricity or heat) — compare semiconductor b :  a device made of an electrical insulating material and used for separating or supporting conductors

Examples of insulator in a sentence

  1. Metal is not a good insulator.

1801

First Known Use of insulator

1801


INSULATOR Defined for English Language Learners

insulator

play
noun in·su·la·tor \ˈin(t)-sə-ˌlā-tər\

Definition of insulator for English Language Learners

  • : a material that allows little or no heat, electricity, or sound to go into or out of something


INSULATOR Defined for Kids

insulator

play
noun in·su·la·tor \ˈin-sə-ˌlā-tər\

Definition of insulator for Students

  1. :  a material (as rubber or glass) that is a poor conductor of electricity, heat, or sound


Medical Dictionary

insulator

play
noun in·su·la·tor \ˈin(t)-sə-ˌlāt-ər\

Medical Definition of insulator

  1. :  a material that is used to provide insulation; also :  a device made of such material



Seen and Heard

What made you want to look up insulator? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

a Mesopotamian temple tower

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

  • alphabet-magnets
  • Which is the correct spelling?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ