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

Bearpaw Kendall Boots These tall boots provide full insulation against the cold with a wool-blend lining that keeps your feet and legs warm. —Alesandra Dubin, Travel + Leisure, 1 Dec. 2025

Think insulation and durability. —Izzy Baskette, PEOPLE, 1 Dec. 2025

Thanks to a reflective barrier and moisture-resistant surface, you can be assured that the structure and insulation. —Alicia Geigel, Southern Living, 30 Nov. 2025

Asbestos was used by building and construction industries for strengthening cement and plastics as well as for insulation, roofing, fireproofing and sound absorption. —Jasmine Laws, MSNBC Newsweek, 26 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