Mir·ror n.
 1. A looking-glass or a speculum; any glass or polished substance that forms images by the reflection of rays of light.
 And in her hand she held a mirror bright,
 Wherein her face she often viewèd fair.   --Spenser.
 2. That which gives a true representation, or in which a true image may be seen; hence, a pattern; an exemplar.
    She is mirour of all courtesy.   --Chaucer.
 O goddess, heavenly bright,
 Mirror of grace and majesty divine.   --Spenser.
 3. Zool. See Speculum.
 Mirror carp Zool., a domesticated variety of the carp, having only three or fur rows of very large scales side.
 Mirror plate. (a) A flat glass mirror without a frame. (b) Flat glass used for making mirrors.
 Mirror writing, a manner or form of backward writing, making manuscript resembling in slant and order of letters the reflection of ordinary writing in a mirror. The substitution of this manner of writing for the common manner is a symptom of some kinds of nervous disease.