Definition of insulator
: one that insulates: such asa : a material that is a poor conductor (as of electricity or heat) — compare semiconductorb : a device made of an electrical insulating material and used for separating or supporting conductors
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Examples of insulator in a Sentence
Metal is not a good insulator.
Recent Examples of insulator from the Web
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To tackle the cold without relying on fat as an insulator, many weasels grow luxurious fur coats, some of the densest in nature.
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Glass is already a great insulator, so will the extra layer of air make a difference?
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'insulator'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use of insulator
1801
INSULATOR Defined for English Language Learners
insulator
playDefinition of insulator for English Language Learners
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: a material that allows little or no heat, electricity, or sound to go into or out of something
INSULATOR Defined for Kids
insulator
playDefinition of insulator for Students
: a material (as rubber or glass) that is a poor conductor of electricity, heat, or sound
Medical Dictionary
insulator
playMedical Definition of insulator
: a material that is used to provide insulation; also : a device made of such material
Learn More about insulator
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See words that rhyme with insulator Spanish Central: Translation of insulator Nglish: Translation of insulator for Spanish speakers Britannica English: Translation of insulator for Arabic speakers Britannica.com: Encyclopedia article about insulator
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