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

The house is made from high-quality materials, including insulated and soundproof interior walls. —Toni Sutton, People.com, 29 Mar. 2025

Other notable features of the beachside home include the chef-style kitchen with limestone countertops and cherry wood cabinetry, stainless steel appliances, floor-to-ceiling glass doors and the soundproof acoustic fencing around the property (to reduce outside noise). —Moná Thomas, People.com, 21 Mar. 2025

Verb

Head to the backside of the library, where architects used glass partitioning and rammed earth to nearly soundproof the space from both Caltrain horns and the children’s area. —Linda Zavoral, The Mercury News, 24 Mar. 2025

In New York there was a black site above a bustling food court, the windows darkened and the rooms soundproofed so that the screaming never reached the people sitting below. —Lidija Haas, Harper's Magazine, 3 Mar. 2025

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