one-way mirror
noun
a sheet of glass that can be seen through from one side and is a mirror on the other, used especially for observation of criminal suspects by law-enforcement officials or witnesses.
Also called
two-way mirror.
Words nearby one-way mirror
one-trick pony,
one-two,
one-up,
one-upmanship,
one-way,
one-way mirror,
one-way ticket,
one-woman,
one-worlder,
onefold,
oneg shabbat
British Dictionary definitions for two-way mirror
two-way mirror
noun
a half-silvered sheet of glass that functions as a mirror when viewed from one side but is translucent from the other