Meaning of DIAGONAL in English

DIAGONAL

di ‧ ag ‧ o ‧ nal /daɪˈæɡən ə l/ BrE AmE adjective

[ Date: 1500-1600 ; Language: Latin ; Origin: diagonalis , from Greek diagonios 'from angle to angle' , from gonia 'angle' ]

1 . a diagonal line is straight and joins two opposite corners of a flat shape, usually a square ⇨ horizontal , vertical

2 . following a sloping angle:

diagonal parking spaces

—diagonal noun [countable]

—diagonally adverb :

The path goes diagonally across the field.

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.