concŭbīnātus (noun M) : id..
* Union of a man with an unmarried woman (usu. of a lower social grade than himself), concubinage (opp. matrimonium on the one hand, and adulterium or stuprum on the other; not in Cic.): emere aliquam in concubinatum sibi,Plaut. Poen. prol. 102: in concubinatum alicui dare (opp. in matrimonium),id. Trin. 3, 2, 64; cf. Dig. 25, 7, 1; 48, 5, 13.—*
* Adulterous intercourse: nuptarum,i.e. with the betrothed,Suet. Ner. 28.

s. TLL