two-way mirror

Interrogation room window

A two-way mirror is a sheet of glass that acts as a mirror on one side but can be seen through from the other, typically used in police interrogation rooms and surveillance settings.

The effect depends on lighting—the brighter side sees a mirror, the darker side sees through.

Also called a one-way mirror, which describes the same object from the opposite perspective.

Opposites
transparency/function

two-way mirrorclear glass

Transparent silica sheet

transparent glass · window · frosted glass

concealment/honesty

two-way mirroropen window

Unsealed wall aperture

Family

mirror, mirrors, mirrored, mirroring, twinned, twinning, twilight, twofold, twenty

Familiarity
Top 100,000
Profile
Known to kids · Used worldwide · Timeless · Concrete · Everyday, not technical · Rated G