KJV Dictionary Definition: concubinate
CONCUBINATE, n. Whoredom; lewdness. Not in use.
CONCUBINE, n. L., to lie together, to lie down.
1. A woman who cohabits with a man, without the authority of a legal marriage; a woman kept for lewd purposes; a kept mistress.
2. 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.