Which term is most applicable to couples living in households as unmarried partners?cohabitation.
What is cohabitation?
People who are not married and typically couples live together in a cohabitation arrangement.
They frequently engage in relationships that are romantically intimate and last a lifetime.
Since the latter half of the 20th century, such arrangements have grown more prevalent in western nations,
This is primarily due to the large part with shifting social perceptions, particularly those related to marriage, gender roles, and religion.
Because it is more convenient to live with someone else, because they need to save money, or because they can't find lodging elsewhere, cohabitants may do so.
A period of cohabitation occurs before 60% of all marriages today.