- 1[countable] a piece of special flat glass that reflects images, so that you can see yourself when you look in it He looked at himself in the mirror. a rear-view mirror (= in a car, so that the driver can see what is behind) a side-view mirror (= on the side of a car)
- 2a mirror of something [singular] something that shows what something else is like The face is the mirror of the soul. Dickens's novels are a mirror of his times.
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