miter \mi"ter\, mitre \mi"tre\, v. t. imp.  p. p. miteredor
   mitred; p. pr.  vb. n. miteringor mitring.
   1. to place a miter upon; to adorn with a miter. wordnet
      sense 2 "mitered locks." --milton.
      1913 webster

   2. to match together, as two pieces of molding or brass rule
      on a line bisecting the angle of junction; to fit together
      in a miter joint. wordnet sense 3
      1913 webster

   3. to bevel the ends or edges of, for the purpose of matching
      together at an angle. wordnet sense 1
      1913 webster miter
see also:
mitered mitred mitering mitring