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.
Nearby words
one-trick pony, one-two, one-up, one-upmanship, one-way, one-way mirror, one-way ticket, one-woman, one-worlder, onefold, oneg shabbat
Also called two-way mirror.
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019