❶ （古代的一种玉器） a round flat piece of jade with a hole in its centre (used for ceremonial purposes in ancient China) ❷ （姓氏） a surname: ～ 光 Bi Guang ◆璧还 [书] [敬] return (a borrowed object) with thanks;decline (a gift) with thanks； 璧谢 [书] [敬] decline (a gift) with thanks