- Also called: insulant /
ˈɪnsjʊlənt/ material used to insulate a body, device, or region the act or process of insulating
WordReference Random House Learner's Dictionary of American English © 2026
in•su•la•tion /ˌɪnsəˈleɪʃən, ˌɪnsyə-/USA pronunciation
n. [uncountable]
WordReference Random House Unabridged Dictionary of American English © 2026- Buildingmaterial used for insulating:used fiberglass insulation in their attic.
- the act of insulating;
the state of being insulated.
in•su•la•tion
(in′sə lā′shən, ins′yə-),USA pronunciation n.
- Buildingmaterial used for insulating.
- the act of insulating.
- the state of being insulated.
- insulate + -ion 1790–1800
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