Word: 空洞 (kōngdòng) 空洞 dictionary entry kōngdòng cavity; empty; vacuous Full dictionary entry for 空洞 Example sentences using 空洞 2 sentences, showing page 1 of 1. 中国的当代青年文化很空洞。 Zhōngguó de dāngdài qīngnián wénhuà hěn kōngdòng. Contemporary Chinese youth culture is very shallow. 牙齿上有一个小空洞。 Yáchǐ shàng yǒu yí gè xiǎo kōngdòng. There is a small cavity in the tooth.