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

Meanwhile, the company is already repurposing used blades into products such as insulation materials, solar panel frames, and even skis. —Georgina Jedikovska, Interesting Engineering, 16 Dec. 2025

Improving your home's insulation can significantly reduce the time your furnace spends actively heating the space, lowering your utility bill. —Kamron Sanders, Better Homes & Gardens, 16 Dec. 2025

The Smartloft™ insulation, made with recycled wool, helps regulate your core temperature, while the stretchy merino-blend fleece enhances mobility and boosts warmth everywhere else. —Brian Higgins, Outside, 15 Dec. 2025

No, not all leather gloves are for the purpose of insulation. —Eric Twardzik, Robb Report, 15 Dec. 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