- 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
- anything that gives a true representation or description
- Rare something to be imitated or emulated; model
- Archaic a crystal used by fortune-tellers, sorcerers, etc.
Origin of mirrorMiddle English mirour from Old French mireor from Vulgar Latin an unverified form miratorium from mirare: see mirage