In contemporary civil law, concubinage is a legal term that is sometimes used for an interpersonal, intimate relationship between a man and a woman, or, depending on the jurisdiction, unmarried couple,[1][2] in which the couple wish to cohabit, but do not want to or cannot enter into a full marriage.[3]
In the legal system of the Philippines, concubinage also has a distinct criminal usage in the 1930 Revised Penal Code, relating to adultery. It is quite distinct from other legal usage.
The term concubinage also has a wider usage as a term relating to the keeping of concubines[4] that has been applied to a wide variety of historical situations that have entailed various degrees of freedom, power and privilege for the women involved. In the twenty-first century, the term has come primarily to refer either to an extramarital mistress or a sex slave.[3]