1. [noun] A smooth surface, usually made of glass with reflective material painted on the underside, that reflects light so as to give an image of what is in front of it.
2. [noun] (figuratively) an object, person, or event that reflects or gives a picture of another.
3. [noun] (internet) A webpage or URL that contains a replicated data.
4. [noun] A mirror carp.
5. [verb] (transitive) Of an event, activity, behaviour, etc, to be identical to, to be a copy of.
6. [verb] (computing) (transitive) To create something identical to (a web site, etc.).
7. [verb] To reflect.
8. [noun] Polished surface that forms images by reflecting light.
9. [noun] A faithful depiction or reflection; 'the best mirror is an old friend'.
10. [verb] Reflect as if in a mirror; 'The smallest pond at night mirrors the firmament above'.
11. [verb] Reflect or resemble; 'The plane crash in Milan mirrored the attack in the World Trade Center'.