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

The ground will provide insulation for the roots in cold weather. —Karen Brewer Grossman, Southern Living, 30 Sep. 2025

HydroJug Traveler 40-Ounce Water Bottle The HydroJug Traveler has triple-wall insulation that keeps drinks hot or cold for up to 24 hours. —Sian Babish, PEOPLE, 26 Sep. 2025

The Stanley tumbler has earned its glowing reputation because of its sustainable stainless steel materials, reusable straw, and double-wall vacuum insulation. —Maria Conti, Better Homes & Gardens, 25 Sep. 2025

For example, Enduraflood panels are designed to be easily removed, allowing wet insulation to be replaced and wood framing to dry before the panels are reinstalled. —Ashley Miznazi, Miami Herald, 24 Sep. 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