To finish a material at an angle, frequently 45 degrees, or sometimes with some specific shape, so that it will fit up tightly against another piece of material, as with a picture frame
this means the two edges are joined at a 45° angle Miters are used in the corners of borders and binding In the real world, most picture frames are mitered Mitering mini-lesson
To match together, as two pieces of molding or brass rule on a line bisecting the angle of junction; to bevel the ends or edges of, for the purpose of matching together at an angle
Seaming two edges of material diagonally at a corner or cutting two lengths of wallpaper/border at a 45° angle to form a right angle when they are joined
A tall cap terminating in two peaks, one in front and one in back, that is the distinctive headdress of Bishops (including the pope as bishop of Rome) and abbots of the Western Church
The surface forming the beveled end or edge of a piece where a miter joint is made; also, a joint formed or a junction effected by two beveled ends or edges; a miter joint
{i} official headdress of the bishop in the Western Church; office of bishop in the Western Church; headdress of the ancient Jewish High Priest; 90 degree angle formed by two pieces of wood that are cut on a diagonal to fit together (Carpentry)
a liturgical headdress worn by bishops on formal occasions 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"