miter

joint that forms a corner; usually both sides are bevelled at a 45-degree angle to form a 90-degree corner

the surface of a beveled end of a piece where a miter joint is made; "he covered the miter with glue before making the joint"

a liturgical headdress worn by bishops on formal occasions

bevel the edges of, to make a miter joint

confer a miter on (a bishop)

fit together in a miter joint