noun. A woman who cohabits with a man without being legally married to him.

noun. In certain societies, such as imperial China, a woman contracted to a man as a secondary wife, often having few legal rights and low social status.

noun. A paramour, male or female.

noun. A wife of inferior condition; one whose relation is in some respects that of a lawful wife, but who has not been united to the husband by the usual ceremonies: as, Hagar and Keturah, the concubines of Abraham.

noun. A woman who cohabits with a man without being married to him; a kept mistress.

noun. A woman who cohabits with a man without being his wife; a paramour.

noun. A wife of inferior condition; a lawful wife, but not united to the man by the usual ceremonies, and of inferior condition. Such were Hagar and Keturah, the concubines of Abraham; and such concubines were allowed by the Roman laws. Their children were not heirs of their father.

noun. A woman who lives with a man, but who is not a wife.

noun. A slave-girl for sexual service prominent in all ancient cultures.

noun. Signifies a relationship where the male is the dominant partner, socially and economically

noun. A woman attached to a man solely for reproduction, and who cares for the resulting children without any romantic relationship.

noun. a woman residing in a harem and kept, as by a sultan or emperor, for sexual purposes.

noun. A woman kept by a man who is high in hierarchial society in addition to his wives, e.g in the imperial harem or within a household.

noun. a woman who cohabits with an important man

"The south-east's property shortage could be solved overnight if London's single blokes were forced to take a live-in concubine (or rent boy, if they're that way inclined)."

co-wife  concubines  harem  polygamy  seraglio  

fancy woman  kept woman  mistress  

odalisque  

brother-in-law  consort  cortege  freedman  jure  

better half  bondmaid  bondman  bondslave  bondsman