quadrilateral
UK /ˌkwɒdɹɪˈlætəɹəl/ US /ˌkwɑdɹəˈlætəɹəl/
noun 2adj 1
Definitions
noun
1
A polygon with four sides.
2
An area defended by four fortresses supporting each other.
The Venetian quadrilateral comprised Mantua, Peschiera, Verona, and Legnano.
adj
1
Having four sides.
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