(optics) A mirror that consists of an incomplete reflective coating, so that half of the incident light is reflected and the other half is transmitted.

Alternative form of hold a mirror to

A mirror reflecting images on one side and transparent on the other, often used by the police during interrogations.

A mirror inside a vehicle that allows the driver to see the traffic behind. / (figuratively, by extension) The observer's perception of something that is past or has been surpassed.

(Australia, New Zealand) A rear-view mirror.

plural of rear vision mirror

plural of mirror-image twin

A kind of monozygotic twin exhibiting reversed asymmetry with the other twin in certain physical characteristics.

plural of Chinese magic mirror

A kind of ancient mirror made from polished bronze and capable of projecting a pattern onto a surface when struck by bright light.