洞 dòngtóng HSK5 cave Definitions Defs Origin Strokes Stroke Words Sentences Sents Showing: zero All meanings 28 dòng 27 hole 26zero 1tóng 1 place name 1 1 sentence for 洞 (dòng — zero) 他的房间号是五洞一。 tā de fángjiān hào shì wǔ dòng yī. His room number is 501. Source: Dong Chinese Dictionary