Real Dictionary

mirror
countable noun: A mirror is a flat piece of glass which reflects light, so that when you look at it you can see yourself reflected in it.

mirror in American English
a smooth surface that reflects the images of objects; esp., a piece of glass coated on the reverse side as with silver or an amalgam
to reflect, as in a mirror; give or show a likeness of
noun: a reflecting surface, originally of polished metal but now usually of glass with a silvery, metallic, or amalgam backing

mirror in British English
noun: a surface, such as polished metal or glass coated with a metal film, that reflects light without diffusion and produces an image of an object placed in front of it
verb: to reflect, represent, or depict faithfully

mirror in Hospitality
noun: A mirror is a flat piece of glass which reflects light, so that when you look at it you can see yourself reflected in it.