quadrilateral

noun, adj — 3 senses

quadrilateral

noun

UK /ˌkwɒdɹɪˈlætəɹəl/ · CA, US /ˌkwɑdɹəˈlætəɹəl/

Etymology Learned borrowing from New Latin quadrilaterus + -al.

1

Geometry, Mathematics, Sciences A polygon with four sides.

2

An area defended by four fortresses supporting each other.

The Venetian quadrilateral comprised Mantua, Peschiera, Verona, and Legnano.

Synonyms: 4-gon, tetragon, quadrilateral, quadrilater, quadrangle, tetract
Derived terms: cyclic quadrilateral, gyroquadrilateral, quadrilateral space syndrome
Hypernyms: polygon
Hyponyms: square, kite, rectangle, rhombus, parallelogram, trapezoid
Coordinate terms: decagon, dodecagon, enneagon, hendecagon, hexagon, icosagon, nonagon, octagon, pentagon, septagon, triangle, tridecagon, undecagon

quadrilateral

adj

Etymology Learned borrowing from New Latin quadrilaterus + -al.

1

Having four sides.

Derived terms: nonquadrilateral, quadrilaterality, quadrilateralize, quadrilaterally, quadrilateralness

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.