A Gējì or Geji is a female professional performer of song and dance in ancient China. The modern term "Yiji (艺妓)" is not used in ancient Chinese sources. The modern expression "Yiji (艺妓)" in Chinese may have been first seen in the novel "The Ancient House" by Wang Xiyan.The modern expression "Yiji(藝妓)" in Chinese may also have appeared earlier in Taiwan's Alias for Yidan(藝旦) during the Japanese occupation.

Courtesan, in modern usage, is a euphemism for a kept mistress or prostitute, particularly one with wealthy, powerful, or influential clients. The term historically also referred to a courtier, a person who attended the court of a monarch or other powerful person.