Soundproof

Origin

sound + -proof

Full definition of soundproof

Adjective

1. Not allowing sound through.The contestant was placed in a soundproof booth so he could not receive help from the audience.

Derived terms

• soundproofing

Verb

1. To make resistant to transmitting sound.We soundproofed the room so we couldn't hear the road noises; unfortunately we couldn't hear the fire alarm either.