Definitions
1.nounA line joining non-adjacent vertices of a polygon.
2.nounAnything forming or resembling such a line, particularly:
3.adjectiveJoining two nonadjacent vertices (of a polygon or polyhedron).
4.adjectiveHaving slanted or oblique lines or markings.
5.adjectiveHaving a slanted or oblique direction.
6.adjectiveOf or related to the cater-corner (diagonally opposite) legs of a quadruped, whether the front left and back right or front right and back left.