Noah Webster
Miter
MI'TER, noun
1. A sacerdotal ornament worn on the head by bishops and certain abbots, on solemn occasions.
2. In architecture, an angle of 45 degrees.
3. In Irish history, a sort of base money or coin.
4. Figuratively, the dignity of bishops or abbots.
MI'TER, verb transitive To adorn with a miter
1. To unite at an angle of 45 degrees.