Con"cu*bine (?), n. [F., fr. L. concubina; con- + cubare to lie down, concumbere to lie together, akin to E. cubit.]
A woman who cohabits with a man without being his wife; a paramour.
⇒ Concubine has been sometimes, but rarely, used of a male paramour as well as of a female.
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.
© Webster 1913.