to bevel the ends or edges of to form a miter joint
See miter in American Heritage Dictionary 4
(mīˈtər)
noun
The liturgical headdress and part of the insignia of a Christian bishop. In the Western church it is a tall pointed hat with peaks in front and back, worn at all solemn functions.
a. A thong for binding the hair, worn by women in ancient Greece.
b. The ceremonial headdress worn by ancient Jewish high priests.
a. A miter joint.
b. The edge of a piece of material that has been beveled preparatory to making a miter joint.