diagonal: Meaning and Definition of

di•ag•o•nal

1. connecting two nonadjacent angles or vertices of a polygon or polyhedron, as a straight line.
2. extending from one edge of a solid figure to an opposite edge, as a plane.
2. having an oblique direction.
3. having oblique lines, ridges, markings, etc.

1. a diagonal line or plane.
2. virgule.
3. a diagonal row, part, pattern, etc.
4. (of a horse at a trot) the foreleg and the hind leg, diagonally opposite, which move forward simultaneously.
5. See
6. a set of entries in a square matrix running either from upper left to lower rightor lower left to upper right
7. one of the oblique lines of squares on a chessboard: He advanced his bishop along the open diagonal.