sound·​proof | \ˈsau̇n(d)-ˌprüf \

Definition of soundproof 

(Entry 1 of 2)

: impervious to sound


soundproofed; soundproofing; soundproofs

Definition of soundproof (Entry 2 of 2)

transitive verb

: to insulate so as to obstruct the passage of sound

Examples of soundproof in a Sentence

Recent Examples on the Web: Adjective

Though not completely soundproof, the noise is significantly reduced when the doors, which lie flat against the walls when open, are closed. Karen Bruno, WSJ, "The Antidote to Open-Plan Layouts," 6 June 2018 Airport hotel rooms need to have blackout curtains for daytime sleeping, frequent travelers say, along with soundproof windows. Scott Mccartney, WSJ, "Wait, When Did Airport Hotels Turn Cool?," 23 May 2018 Microsoft is trying to get in on the same space with Mixer, its own streaming solution that featured yet another massive booth where content creators could stream from soundproof booths. Kyle Orland, Ars Technica, "Gallery: The streamers, game makers, and costumed players of PAX East 2018," 8 Apr. 2018 Putting on the infant oxygen mask and placing the child in a soundproof coffin (something from Dystopic Parenting magazine?) will buy a couple days, max. Bryan Alexander, USA TODAY, "'A Quiet Place': Our 5 screaming questions after seeing the silent thriller (spoilers!)," 8 Apr. 2018 His reported taste for sirens and flashing lights, bulletproof cars and soundproof phone booths has also invited ridicule from critics. Noah Bierman,, "White House says it will move on with border plan — with or without California," 6 Apr. 2018 Inside the first floor Jay Grinney Hall, seating can accommodate 250 people with soundproof wall partitions that can divide the space. William Thornton,, "Encompass Health ready to open new home office," 23 Mar. 2018 The latest example: Pruitt’s soundproof phone booth at the EPA actually cost $18,000 more than previously disclosed. James Hohmann, Washington Post, "The Daily 202: Third Way makes an opening bid in the 2020 ‘ideas primary’," 15 Mar. 2018 Earlier this week, the Washington Post reported that the EPA spent nearly $25,000 to construct a secure, soundproof communications booth in Pruitt’s office. Margaret Hartmann, Daily Intelligencer, "Like Tom Price, Scott Pruitt Spent More Than $58K on Noncommercial Flights," 28 Sep. 2017

Recent Examples on the Web: Verb

Nap York’s floors are soundproofed with upcycled tires, while white-noise machines emit a gentle hum. Ashley Mateo, WSJ, "Are $15 Nap Breaks the New Lunch Breaks?," 29 Aug. 2018 Safety and soundproofing measures are required as part of the project's approval. Erin Sauder, Elgin Courier-News, "East Dundee to get another gun range," 13 July 2018 Did the airport pay for soundproofing the homes of people living close to it? Michelle Theriault Boots, Anchorage Daily News, "Readers had lots of questions about airplane noise from the airport’s runway closure. Here are some answers.," 10 July 2018 Though the church paid to install air conditioning and has soundproofed windows in order to minimize the noise, neighbors continued to push to prohibit the church from holding any activities that weren’t church activities, Mixon told me. Alana Semuels, The Atlantic, "The Preacher Who Wanted to Save Silicon Valley’s Soul," 29 May 2018 New York The glass windows in each guest room have seven layers of soundproofing material and are more than 4 inches thick. Scott Mccartney, WSJ, "Wait, When Did Airport Hotels Turn Cool?," 23 May 2018 The center's expansive offices are soundproofed, with reflective glass windows for privacy. Teresa Watanabe,, "Three decades before the #MeToo movement, UC San Diego led the way against sexual assault," 30 Apr. 2018 Though centrally situated along a busy multilane boulevard, the hotel is soundproofed and feels insulated from the hubbub, thanks in part to its hushed, candlelit spaces and policy of admitting only hotel guests on the premises. Seth Sherwood, New York Times, "In Bangkok, an Intimate Hotel With an Inky Past," 14 Apr. 2018 One example would be the developer of a block of flats being required to install soundproofing to mitigate against any noise from an existing music venue. Richard Smirke, Billboard, "UK Music Industry Bands Together to Save Grassroots Venues From Closure," 10 Jan. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'soundproof.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of soundproof


circa 1878, in the meaning defined above


1919, in the meaning defined above

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Time Traveler for soundproof

The first known use of soundproof was circa 1878

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More Definitions for soundproof



English Language Learners Definition of soundproof

 (Entry 1 of 2)

: not allowing sound to enter or leave



English Language Learners Definition of soundproof (Entry 2 of 2)

: to make (something) soundproof


sound·​proof | \ˈsau̇nd-ˈprüf \

Kids Definition of soundproof

: capable of keeping sound from entering or escaping

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Comments on soundproof

What made you want to look up soundproof? Please tell us where you read or heard it (including the quote, if possible).


something that serves to warn or remind

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