Meaning of POLYGON in English

POLYGON

pol ‧ y ‧ gon /ˈpɒlɪɡən $ ˈpɑːlɪɡɑːn/ BrE AmE noun [countable]

technical a flat shape with three or more sides

—polygonal /pəˈlɪɡən ə l/ adjective

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.