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

• 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

And using a layer of cardboard as insulation between the window and the foil can keep heat from stressing and potentially cracking a window. —Andrea Thompson, Scientific American, 24 June 2025

Of course, staying comfortable in that kind of weather will entail flipping the Truma Combi furnace/water heater on to create a warm cabin environment that makes use of the climate-isolating heavy insulation package. —New Atlas, 23 June 2025

And customers have remarked on how quiet their homes are, due to their insulation. —Ella Nilsen, CNN Money, 20 June 2025

The war brought them together and eventually landed them in Poltava, where their new fight involves metal frames and insulation panels instead of trauma kits and field bandages. —Dominique Soguel, Christian Science Monitor, 17 June 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