Word: 乌云 (wūyún) Traditional: 烏雲 乌云 dictionary entry wūyún black cloud Full dictionary entry for 乌云 Example sentences using 乌云 3 sentences, showing page 1 of 1. 天空乌云密布。 Tiānkōng wūyún mìbù. The sky is full of dark clouds. 空中乌云密布。 Kōngzhōng wūyún mìbù. The sky is full of dark clouds. 空中有一大片乌云。 Kōngzhōng yǒu yí dàpiàn wūyún. There is a mass of dark clouds in the sky.