(bound form) a round, flat piece of jade with a hole in the center used in ancient China as a ritual object or ornament

(bound form) used as a general term for beautiful jade or things as precious and flawless as jade

(bound form) to return a gift or an object to its owner; used in polite expressions like 璧还 bì​huán

(bound form) beautiful or round like a jade annulus; specifically used to describe handsome people or celestial bodies like the sun and moon