insulation

noun

in·​su·​la·​tion ˌin(t)-sə-ˈlā-shən 

1

: material used in insulating

2

a

: the state of being insulated

b

: the action of insulating

Synonyms of insulation

• solitude
• privacy
• isolation
• segregation

Examples of insulation in a Sentence

These materials provide the insulation needed in cold weather.

she had grown up in such rural insulation that she'd never met anyone of a different race

Recent Examples on the Web

This protects against higher costs that arise from the need to bring a home up to current building code — such as upgrades to wiring, plumbing or insulation — when rebuilding. — Greg Iacurci, CNBC, 26 Sep. 2026

The result gives Crocs’ Tembo silhouette a narrower, more sneaker-like profile while adding insulation and traction. — Alexandra Harrell, Footwear News, 25 Sep. 2026

These roofs are weather- and pest-resistant, provide natural insulation, and can last decades, depending on the material used. — Elizabeth Stamp, Architectural Digest, 25 Sep. 2026

The Yeti Silo Jug is built with virtually indestructible materials and the same Permafrost insulation found in the Roadie Hard Coolers. — Red Fabbri, Travel + Leisure, 22 Sep. 2026

Word History

First Known Use

1798, in the meaning defined at sense 2b

Rhymes for insulation

• abdication
• aberration
• abjuration
• abnegation
• abrogation
• acceptation
• acclamation
• acclimation
• accusation
• activation
• actuation
• acylation

Kids Definition

insulation

noun

in·​su·​la·​tion ˌin(t)-sə-ˈlā-shən 

1

: the act of insulating : the state of being insulated

2

: material used in insulating

Medical Definition

insulation

noun

in·​su·​la·​tion ˌin(t)-sə-ˈlā-shən 

1

: the action of separating a conductor from conducting bodies by means of nonconductors so as to prevent transfer of electricity, heat, or sound

also : the state resulting from such action

2

: material used to provide insulation

insulate

ˈin(t)-sə-ˌlāt 

transitive verb

insulated; insulating