四边形 Traditional form: 四邊形 Pinyin (reading): sìbiānxíng Definitions: quadrilateral Characters: 四 - four 边 - border, edge, margin, side 形 - form, shape; to appear; to describe; to look Traditional characters: 四 - four 邊 - border, edge, margin, side 形 - form, shape; to appear; to describe; to look