Word: 扩散 (kuòsàn) Traditional: 擴散 扩散 dictionary entry kuòsàn to spread Full dictionary entry for 扩散 Example sentences using 扩散 2 sentences, showing page 1 of 1. 墨水在水里慢慢扩散。 Mòshuǐ zài shuǐ lǐ mànmàn kuòsàn. The ink slowly spreads out in the water. 烟味已经扩散到隔壁了。 Yān wèi yǐjīng kuòsàn dào gébì le. The smell of smoke has already spread next door.