ETYM French mitre, from Latin mitra headband, turban, Greek.
A liturgical headdress worn by bishops on formal occasions; SYN. mitre.
High headdress worn by bishop or archbishop.
In the Christian church, the headdress worn by bishops, cardinals, and mitered abbots at solemn services. There are miters of many different shapes, but in the Western church they usually take the form of a tall cleft cap. The miter worn by the pope is called a tiara.

1. To bevel the edges of, to make a miter joint.
2. To confer a miter on, as of a bishop.
3. To fit together in a miter joint.