con‧cu‧bine /ˈkɒŋkjəbaɪn, ˈkɒŋkjʊbaɪn $ ˈkɑːŋ-/ noun [countable]
[Date: 1200-1300; Language: Old French; Origin: Latin concubina, from com- ( ⇒ COM-) + cubare 'to lie']
a woman in the past who lived with and had sex with a man who already had a wife or wives, but who was socially less important than the wives

[TahlilGaran] Dictionary of Contemporary English ▲