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 insulation was poor, and the home had no heat. —Annie Hylton, New Yorker, 14 May 2026

Pay special attention to the spaces around your windows and doors and create air-tight seals there with a weatherstripping foam or insulation kit. —Hallie Milstein, Southern Living, 13 May 2026

Today, its trajectory is shaped increasingly by insulation. —Yu Jie, Time, 13 May 2026

Finally, homeowners insurance generally covers burst pipes, roof damage and falling limbs when the damage is sudden and unexpected, but claims can be denied if insurers find negligence — like shutting off the heat or skipping pipe insulation, per guidance from the Texas Department of Insurance. —Tiffani Jackson, Fort Worth Star-Telegram, 11 May 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