1
[ adjective ] impervious to, or not penetrable by, sound

Examples

"a soundproof room"

Used in print

(David Stacton, The Judges of the Secret Court....)

Guns were going_off all_over Washington_City these days , because of the celebrations , and the theatre was not soundproof .

Related terms

impervious

2
[ verb ] insulate against noise

Examples

: "Proust had his apartment soundproofed"

Related terms

insulate

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