Meaning of DIAGONAL in English

DIAGONAL

I. adjective see: knee Date: 1563 1. joining two vertices of a rectilinear figure that are nonadjacent or two vertices of a polyhedral figure that are not in the same face, passing through two nonadjacent edges of a polyhedron , 2. inclined obliquely from a reference line (as the vertical) , having ~ markings or parts , II. noun Date: 1571 a ~ straight line or plane, 2. a. a ~ direction, a ~ row, arrangement, or pattern, something oriented in ~ position, slash 4

Merriam Webster. Explanatory English dictionary Merriam Webster.      Толковый словарь английского языка Мерриам-Уэбстер.