Antonym of diagonal

Antonyms of noun diagonal

Antonyms of adj diagonal

2 senses of diagonal

Sense 1:

diagonal

INDIRECT (VIA perpendicular, oblique) -> parallel
INDIRECT (VIA oblique, parallel) -> perpendicular

Sense 2:

aslant, aslope, diagonal, slanted, slanting, sloped, sloping

INDIRECT (VIA vertical, inclined) -> horizontal
INDIRECT (VIA inclined, horizontal) -> vertical, perpendicular