soundproof

1 of 2

adjective

sound·​proof ˈsau̇n(d)-ˌprüf How to pronounce soundproof (audio)
Synonyms of soundproofnext
: impervious to sound

soundproof

2 of 2

verb

soundproofed; soundproofing; soundproofs

transitive verb

: to insulate so as to obstruct the passage of sound

Examples of soundproof in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Adjective
The first installment centered on a 13-year-old boy who’s being held in a soundproof basement by a sadistic, masked killer. Abid Rahman, HollywoodReporter, 21 Dec. 2025 The walls are also soundproof, offering privacy between rooms, and the structure comes fully equipped with electricity and plumbing. Toni Sutton, PEOPLE, 23 Nov. 2025
Verb
The 70-year-old former soundproofing specialist had run out of home improvement projects. Barbara Bry, San Diego Union-Tribune, 21 Dec. 2025 This is great for soundproofing or simply adding warmth and softness to a room without using paint or wallpaper. Melissa Locker, Southern Living, 1 Dec. 2025 See All Example Sentences for soundproof

Word History

First Known Use

Adjective

circa 1878, in the meaning defined above

Verb

1919, in the meaning defined above

Time Traveler
The first known use of soundproof was circa 1878

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Cite this Entry

“Soundproof.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/soundproof. Accessed 28 Dec. 2025.

Kids Definition

soundproof

adjective
sound·​proof
ˈsau̇n(d)-ˈprüf
: designed to prevent sound from entering or leaving
soundproof verb

More from Merriam-Webster on soundproof

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