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
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Adjective
Beyond the main performance stages, the center’s instructional spaces are tailored for drama studies as well as choral, band and orchestra programs, with soundproof practice rooms and breakout rooms featuring acoustic paneling, as well as instrument lockers. Anne Gelhaus, Mercury News, 29 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
Investigators later said the nightclub blaze may have been ignited by sparklers attached to champagne bottles that set fire to soundproofing materials on the ceiling, rapidly spreading flames through the crowded venue. Claire Carter, The Washington Examiner, 11 Mar. 2026 O’Sullivan has a small recording studio in his with a thick gray rug as soundproofing. Daniel Yadin, Curbed, 11 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

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Cite this Entry

“Soundproof.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/soundproof. Accessed 4 Apr. 2026.

Kids Definition

soundproof

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

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