superinsulated

adjective

su·​per·​in·​su·​lated ˌsü-pər-ˈin(t)-sə-ˌlā-təd How to pronounce superinsulated (audio)
: very thoroughly insulated
superinsulated houses
a superinsulated cover

Word History

First Known Use

1843, in the meaning defined above

Time Traveler
The first known use of superinsulated was in 1843

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Cite this Entry

“Superinsulated.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/superinsulated. Accessed 5 Jul. 2026.

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