side-wife

Etymology
From. Compare 🇨🇬.

Noun

 * 1) A woman who (among others) has the potential to become one's wife, or who is fulfilling the role of one's wife in addition to one's actual wife; a concubine
 * 2) * 2015, Law, State, and Society in Early Imperial China (2 vols):
 * For one who has no husband, as well as for one who acts as a side-wife for a person, who has formed a household, or who lives elsewhere and is not enumerated together [with a husband or children on a population register],
 * 1) * 2015, Law, State, and Society in Early Imperial China (2 vols):
 * For one who has no husband, as well as for one who acts as a side-wife for a person, who has formed a household, or who lives elsewhere and is not enumerated together [with a husband or children on a population register],
 * For one who has no husband, as well as for one who acts as a side-wife for a person, who has formed a household, or who lives elsewhere and is not enumerated together [with a husband or children on a population register],