soundproof

1 of 2

adjective

sound·​proof ˈsau̇n(d)-ˌprüf 

: 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

Adjective

However, the inn isn’t soundproof and probably isn’t the best choice for families with children who are still waking throughout the night. — Condé Nast, Condé Nast Traveler, 23 Sep. 2026

Emma, Lizzie, and Bridget claimed not to have heard or seen anything (the house was apparently soundproof and sightproof). — Rafaela Bassili, Vulture, 18 Sep. 2026

Verb

Crews removed the chapel's original wood flooring to install modern electrical and plumbing systems and add soundproofing for the guest rooms before putting the flooring back into place. — Kelly McGreal, FOXNews.com, 20 Sep. 2026

For a soundproofing client, our team uncovered that their tech was featured in Canadian courtrooms. — Expert Panel®, Forbes.com, 6 Aug. 2026

Word History

First Known Use

Adjective

circa 1878, in the meaning defined above

Verb

1919, in the meaning defined above

Rhymes for soundproof

• aloof
• behoof
• disproof
• flameproof
• foolproof
• greaseproof
• leakproof
• reproof
• bulletproof
• fireproof
• waterproof
• weatherproof

Kids Definition

soundproof

adjective

sound·​proof

ˈsau̇n(d)-ˈprüf

: designed to prevent sound from entering or leaving

soundproof verb