diagonal.
Joining two nonadjacent vertices (of a polygon or polyhedron).
Meaning & usage
Joining two nonadjacent vertices (of a polygon or polyhedron).
Having slanted or oblique lines or markings.
Having a slanted or oblique direction.
Of or related to the cater-corner (diagonally opposite) legs of a quadruped, whether the front left and back right or front right and back left.
Where this word comes from
From Middle French diagonal, from Latin diagōnālis, from Ancient Greek διαγώνιος (diagṓnios, “from angle to angle”), from διά (diá, “across”) + γωνία (gōnía, “angle”).
A line joining non-adjacent vertices of a polygon.
Anything forming or resembling such a line A line or plane at an oblique angle to another.
Anything forming or resembling such a line A line or cut across a fabric at an oblique angle to its sides.
Anything forming or resembling such a line Synonym of slash ⟨/⟩.
Where this word comes from
From Middle French diagonal, from Latin diagōnālis, from Ancient Greek διαγώνιος (diagṓnios, “from angle to angle”), from διά (diá, “across”) + γωνία (gōnía, “angle”).
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.