Concubine

Concubine (pronounced kong-kyuh-bahyn)

(1) A woman who cohabits with a man without benefit of marriage, especially one regarded as socially or otherwise subservient.

(2) In jurisdictions which permit polygamy, a secondary wife, often of inferior rank.

(3) A woman residing in a harem and kept (with others), as by a ruler, for wifely purposes.

1250-1300: From the Middle English concubine (a paramour, a woman who cohabits with a man without being married to him) from the Anglo-Norman concubine, from the Latin concubīna, derived from cubare (to lie down), the construct being concub- (variant stem of concumbere & concumbō (to lie together)) + -ina (the feminine suffix).  The related forms are concubinage, concubinary & concubinal.

The status of paramour (a woman who cohabits with a man without benefit of marriage) existed in Hebrew, Greek, Roman and other civilizations, the position sometimes recognized in law as "wife of inferior condition, secondary wife" and there’s much evidence of long periods of tolerance by religious authorities, extended both to priests and the laity.  The concubine of a priest was sometimes called a priestess.

Under Roman civil law, the parties were the concubina (female) and the concubinus (masculine).  Usually, the concubine was of a lower social order but the institution, though ranking below matrimonium (marriage) was a cut above adulterium (adultery) and certainly more respectable than stuprum (illicit sexual intercourse, literally "disgrace" from stupere (to be stunned, stupefied)) and not criminally sanctioned like rapere (“to sexually violate” from raptus, past participle of rapere, which when used as a noun meant "a seizure, plundering, abduction" but in Medieval Latin meant also "forcible violation").

Depictions of concubines in the Egyptian and Persian courts.

Concubinage is, in the west, a term largely of historic interest.  It describes a relationship in which a woman engages in an ongoing conjugal relationship with a man to whom she is not or cannot be married to the full extent of the local meaning of marriage.  This may be due to differences in social rank, an existing marriage, religious prohibitions, professional restrictions, or a lack of recognition by the relevant authorities.  Historically, concubinage was often entered into voluntarily because of an economic imperative.

In the modern vernacular, wives use many words to describe their husbands’ mistress(es).  They rarely use concubine.