class or grade; generation; plaintiff and defendant (old); government department (old)

the Three Caos (Cao Cao 曹操 and his sons Cao Pi 曹丕 and Cao Zhi 曹植), who established the Wei or Cao Wei dynasty 曹魏, and were all three noted poets and calligraphers

market; official in charge of small merchants

(archaic) we; us; (Internet slang) (substitute for 我肏[wo3 cao4]) fuck; WTF

hell; the inferno