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

The clothing is shredded to reuse in padding or insulation, or baled and sent to other countries. —Brandee Gruener, Southern Living, 5 Nov. 2025

It’s filled with ComfortTemp recycled insulation made from plastic bottles and containers and has a water-repellent outer layer. —Shea Simmons, PEOPLE, 4 Nov. 2025

Five different silhouettes feature insulation much like puffer jackets to form The North Face’s Basecamp collection. —Ian Servantes, Footwear News, 4 Nov. 2025

While other down jackets feature down filling all over, the Aconcagua 3 mixes traditional down with synthetic insulation in the torso, which improves its breathability and maximizes warmth and moisture resistance. —Olivia Young, Travel + Leisure, 1 Nov. 2025

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