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

Lululemon develops self-ventilating run vest Lululemon is using a combination of insulation and mesh ventilation to develop cold-weather running apparel that responds to changes in body heat without requiring runners to remove layers. — Alexandra Harrell, Footwear News, 12 Nov. 2026

Cutting the grass too short in fall deprives the roots of insulation against the winter’s cold. — David Beaulieu, The Spruce, 12 Nov. 2026

The pair also don’t have air conditioning, insulation or heat, so dealing with Hawaii’s hot weather means finding ways to work around the temperatures. — Tereza Shkurtaj, PEOPLE, 9 Nov. 2026

Once planted, the surrounding soil provides insulation and helps protect the root system from extreme temperature fluctuations. — Sj McShane, Martha Stewart, 9 Nov. 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