A "de facto relationship" refers to a partnership between two people who live together and share a domestic life without being legally married. This type of relationship is often recognized by law in many jurisdictions, granting partners certain rights and responsibilities similar to those of married couples. In a de facto relationship, partners may share financial resources, raise children together, and make joint decisions about their lives. The specific legal recognition and rights associated with de facto relationships can vary by location, so it's important for partners to understand the laws in their area regarding property rights, child custody, and financial support.