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

And the homes these systems serve vary in terms of insulation, size, sun exposure, and local climate. — Destenie Nock, The Conversation, 22 July 2026

The stainless steel mug has insulation that keeps water ice cold — even during hot days. — Isabel Garcia, PEOPLE, 22 July 2026

Videos shared on social media show one of the injured was left incapacitated on the floor, surrounded by insulation. — Mark Price, Charlotte Observer, 21 July 2026

This Hydro Flask features double-wall vacuum insulation to keep your water and piña coladas cold for up to 24 hours, and your tea or coffee hot for up to 12 hours. — Destinee Scott, Travel + Leisure, 20 July 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