Emily Dickinson Lexicon

MI'TER, or MI'TRE, n. [It. and Sp. mitra; Fr. mitre; Arm. mintr.]

1. A sacerdotal ornament worn on the head by bishops and certain abbots, on solemn occasions. Encyc.
2. In architecture, an angle of 45°. Encyc.
3. In Irish history, a sort of base money or coin. Encyc.
4. Figuratively, the dignity of bishops or abbots.