QUADRILATERAL /ˌkwɒd.ɹəˈlæt.əɹ.əl/ ► audio Scrabble 23 Words With Friends 26 Definition adjective having four sides. — synonyms: four-sided noun a four-sided polygon. — synonyms: quadrangle, tetragon Examples “The Venetian quadrilateral comprised Mantua, Peschiera, Verona, and Legnano.” See all 470 words you can make from QUADRILATERAL → 13-letter words Words starting with Q Words ending with L ← Unscramble different letters