[{"Bold_text": "adjective", "List Items": ["having four sides."]}, {"Bold_text": "noun", "List Items": ["a plane figure having four sides and four angles.", "something of this form.", "Geometry.a figure formed by four straight lines that have six points of intersection.a polygon with four sides.", "a figure formed by four straight lines that have six points of intersection.", "a polygon with four sides.", "the space enclosed between and defended by four fortresses."]}]