quadrilateral C2 Topic:Mathematics & Measurement US /ˌkwɑdɹəˈlætəɹəl/ UK /ˌkwɒdɹɪˈlætəɹəl/ See IPA manual Freq #136497 Meanings 1 noun An area defended by four fortresses supporting each other. The Venetian quadrilateral comprised Mantua, Peschiera, Verona, and Legnano. 2 adj having four sides 3 noun a four-sided polygon 4 noun A polygon with four sides. Thesaurus Synonyms 2 adj · having four sides four-sided 3 noun · a four-sided polygon quadrangle More tetracttetragon Word family Derived forms gyroquadrilateral Etymology Learned borrowing from Latin quadrilaterus + -al. Topics Mathematics & Measurement External links Cambridge Dictionary Wiktionary Google Images # quadrilateral **Type:** Word **Level:** C2 **Part of speech:** noun, adj **IPA (US):** /ˌkwɑdɹəˈlætəɹəl/ **IPA (UK):** /ˌkwɒdɹɪˈlætəɹəl/ **Frequency rank:** 136497 ## Meanings 1. An area defended by four fortresses supporting each other. 2. having four sides 3. a four-sided polygon 4. A polygon with four sides. ## Examples - The Venetian quadrilateral comprised Mantua, Peschiera, Verona, and Legnano. ## Synonyms - quadrangle - tetract - tetragon ## Derived Forms - gyroquadrilateral ## Roots and Affixes - Affix: quad- - four ## Etymology Learned borrowing from Latin quadrilaterus + -al. ## Topics - Mathematics & Measurement markdown