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

On the bottom level, a soundproof movie theater and 1,000-bottle wine cellar join a wellness wing with a gym, sauna, and serene rock waterfall. — Wendy Bowman, Robb Report, 23 Oct. 2026

The soundproof curtain came up, and a crew in T-shirts (Knicks, Amoeba Music) loaded out the garret set. — Sarah Larson, New Yorker, 19 Oct. 2026

Verb

There are steps data centers can take to reduce their impact, including soundproofing equipment and the building itself. — Laura Paddison, CNN Money, 16 Oct. 2026

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

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