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 interior common door [had been] flimsy and not very soundproof. — Kelly McGreal, FOXNews.com, 30 Mar. 2026 Earplugs, thick rugs, and soundproof curtains can all help to reduce sound rather than add to it, and may all help to improve the quality of your overall snoozing. — Laura Kiniry, Popular Science, 25 Mar. 2026
Verb
O’Sullivan has a small recording studio in his with a thick gray rug as soundproofing. — Daniel Yadin, Curbed, 11 Feb. 2026 This is great for soundproofing or simply adding warmth and softness to a room without using paint or wallpaper. — Melissa Locker, Southern Living, 4 Feb. 2026 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

Rhymes for soundproof

See All Rhymes for soundproof

Browse Nearby Words

sound projector
soundproof
soundproofer
See all Nearby Words

Cite this Entry

“Soundproof.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/soundproof. Accessed 7 Jul. 2026.

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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

Thesaurus: All synonyms and antonyms for soundproof

Nglish: Translation of soundproof for Spanish Speakers

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