👉 In the context of social sciences, a "cohabiter" refers to an individual who is part of or has been in a romantic relationship with someone else but does not have a formal legal partnership or marriage. Cohabitation can be defined as a situation where two individuals are living together without the intention of getting married or having a legal union. In sociology, cohabitation can be seen as a form of "cohesion" between two people, where they share common interests, values, and