Soundproof

adj, verb

adj, verb ·Uncommon ·Advanced level

Definitions

Verb
  1. 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."

  2. 2
    insulate against noise wordnet
Adjective
  1. 1
    Not allowing sound through.

    "The contestant was placed in a soundproof booth so he could not receive help from the audience."

Adjective
  1. 1
    impervious to, or not penetrable by, sound wordnet

Synonyms

All synonyms
airtightanechoicballproofbombproofbulletproofburglarproof

Example

More examples

"These walls aren't exactly soundproof."

Etymology

From sound + -proof.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.