Diagonal and Perpendicular

Opposite meaning words

Diagonal adjective - Running in a slanting direction.

Usage example: the diagonal design ran up the wall all the way from the lower left to the upper right-hand corner

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Perpendicular is an antonym for diagonal.

Nearby Word: diagonally

Perpendicular adjective - Rising straight up.

Usage example: river rafters staring awestruck at the canyon's nearly perpendicular cliffs

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Diagonal is an antonym for perpendicular.

Cite this Source

Perpendicular and Diagonal. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/diagonal/perpendicular

Diagonal & Perpendicular. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/diagonal/perpendicular>.

Perpendicular or Diagonal. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/diagonal/perpendicular.

Google Ngram Viewer shows how "diagonal" and "perpendicular" have occurred on timeline