Meaning of DIAGONAL in English

DIAGONAL

n.

Pronunciation: d ī - ' a-g ə -n ə l, - ' ag-n ə l

Function: adjective

Etymology: Latin diagonalis, from Greek diag ō nios from angle to angle, from dia- + g ō nia angle; akin to Greek gony knee ― more at KNEE

Date: 1563

1 a : joining two vertices of a rectilinear figure that are nonadjacent or two vertices of a polyhedral figure that are not in the same face b : passing through two nonadjacent edges of a polyhedron <a diagonal plane>

2 a : inclined obliquely from a reference line (as the vertical) <wood with a diagonal grain> b : having diagonal markings or parts <a diagonal weave>

Merriam Webster Collegiate English Dictionary.      Merriam Webster - Энциклопедический словарь английского языка.