Word Type

Noun

Adjective

Adjective

Proper Noun

The word "diagonal" can be used as noun, adjective, adjective and proper noun.

Word Relationships

Opposites (Antonyms)

backslash

Derived Terms

antidiagonal bidiagonal brachydiagonal broken diagonal clinodiagonal counterdiagonal diagonal argument diagonal calendar diagonal element diagonal mark diagonal matrix diagonal morphism diagonal scale diagonal spread diagonalisation diagonality diagonalization diagonalize diagonalize diagonally diagonalness diagonalwise diagrid dikes dykes equidiagonal gyrodiagonal heptadiagonal leading diagonal macrodiagonal main diagonal minor diagonal nondiagonal offdiagonal orthodiagonal pandiagonal pentadiagonal quasidiagonal secondary diagonal subdiagonal superdiagonal tridiagonal

Derived From

dia

Context

fashion geometry mathematics typography

Broader Terms (Hypernyms)

line punctuation punctuation mark set straight line

Type Of (IsA)

line set straight line

Part Of

checkerboard square matrix

Related Terms

adjacent angle another anything back cater corner cut direction fabric form front having iowa its joining left leg line marking non nonadjacent oblique particularly plane polygon polyhedron quadrilateral quadruped related resembling right side slanted such vertex vertices whether

Similar Terms

inclined oblique oblique

Synonym Network

aslant bias slanting slash solidus

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.