Definitions of miter:

• noun:   a liturgical headdress worn by bishops on formal occasions
• noun:   the surface of a beveled end of a piece where a miter joint is made

  Example: "He covered the miter with glue before making the joint"

• noun:   joint that forms a corner; usually both sides are bevelled at a 45-degree angle to form a 90-degree corner
• verb:   confer a miter on (a bishop)
• verb:   fit together in a miter joint
• verb:   bevel the edges of, to make a miter joint