concubine

Etymology

From Middle English concubine (first attested 1250–1300), from Anglo-Norman concubine, from Latin concubīna, equivalent to concub- (variant stem of concumbō (“to lie together”)) + feminine suffix -īna.

noun

1. A sexual partner, especially a woman, to whom one is not or cannot be married.
2. A woman who lives with a man, but who is not a wife.
3. (chiefly historical) A slave-girl or woman, kept for instance in a harem, who is held for sexual service.
   Solomon, who was one of the Deity's favorities, had a copulation cabinet composed of seven hundred wives and three hundred concubines. c. 1909, Mark Twain, “Letter VIII”, in Letters from the Earth