0 a woman who, in some societies, lives and has sex with a man she is not married to, and has a lower social rank than his wife or wives
He had another son by a Greek concubine, whom he committed to the guardianship of a certain great admiral.
He might marry a secondary wife, or concubine, because he was without offspring, but "the concubine", the Code lays down, "shall not rank with the wife".
Presumably a man may have but one legitimate wife, and children by concubines must be registered as illegitimate.
The difference between the position of the wife and that of the concubine is marked.