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

Propaganda posters from the era from both the democratic United States and the Axis powers surround the imposing, heavy-duty boots, covered in animal hair and insulation. — Douglas Markowitz, Miami Herald, 14 July 2026

The push-button lid keeps the spout covered, the carry loop doubles as a lock, and the double-wall insulation keeps water cold for up to 24 hours. — Brandon Schultz, Travel + Leisure, 14 July 2026

The home's exterior is clad in insulated metal panels with a high level of insulation, which is important since the shelters are deployed year-round, including during Canada's extremely cold winters. — Adam Williams july 10, New Atlas, 10 July 2026

The 4-pin XLR / 3m cable has larger cross-sectional conductors to maintain low resistance over its extended length, with high-strength PFA insulation for durability and electrical performance. — Mark Sparrow, Forbes.com, 10 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