Definitions of mirror:

• noun:   polished surface that forms images by reflecting light
• noun:   a faithful depiction or reflection

  Example: "The best mirror is an old friend"

• verb:   reflect as if in a mirror

  Example: "The smallest pond at night mirrors the firmament above"

• verb:   reflect or resemble

  Example: "The plane crash in Milan mirrored the attack in the World Trade Center"