Meaning of DIAGONAL in English

DIAGONAL

adj. & n.

--adj.

1. crossing a straight-sided figure from corner to corner.

2 slanting, oblique.

--n. a straight line joining two non-adjacent corners.

Derivatives:

diagonally adv.

Etymology: L diagonalis f. Gk diagonios (as DIA-, gonia angle)

Oxford English vocab.      Оксфордский английский словарь.