mirrormir‧ror1 /ˈmɪrɚ/ ●●● noun [countable] 1 a piece of special flat glass that you can look at and see yourself in: the bathroom mirror a rearview mirror (=a mirror in a car, for looking behind you) He looked at himself in the mirror.2mirror image a system or pattern that is almost exactly the same as another one: This year’s election is a mirror image of the one in 1984. [Origin: 1200–1300 Old French mirour, from mirer “to look at,” from Latin mirare]