1. official mistress in some cultures: a woman who is the lover of a wealthy married man but with the social status of a subordinate form of wife, often kept in a separate home, especially in imperial China
2. woman lover living with man: a woman who lives with a man and has a sexual relationship with him but is not married to him
(
dated
)
[13th century. Via French< Latin concubina "sharer of somebody's bed" < cubare "lie down"]
