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

Seal air leaks and improve insulation to stop conditioned air from escaping your home. — Alora Bopray, USA Today, 30 July 2026

In reality, several popular home projects can quietly do the opposite, adding square footage, glass or appliances without matching improvements to insulation, shade or HVAC capacity. — Lauren Jarvis-Gibson july 30, Miami Herald, 30 July 2026

Combined with massaging seats, powerful climate control and extensive sound insulation, the technology turns an unpleasant commute into something approaching a sensory deprivation chamber. — Karl Brauer, Forbes.com, 28 July 2026

The current stays very low, but any wearable consumer product would need strong insulation and extensive safety testing. — Kurt Knutsson, FOXNews.com, 28 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