To "cohabit", in a broad sense, means to "coexist".
Cohabitation is an arrangement where two people who are not married live together without formally registering their relation as a marriage.
Such arrangements have become increasingly common in Western countries during the past few decades, being led by changing social views, especially regarding marriage, gender roles and religion.
They often involve a romantic relationship and/or sexually intimate relationship on a long-term or permanent basis.
More broadly, the term cohabitation can mean any number of people living together.
Historically, many Western countries have been influenced by Christian doctrines on sex, which opposed unmarried cohabitation.
As social mores have changed, such beliefs have become less widely held by the population and some Christian denominations today view cohabitation as a precursor to marriage.has led to women making individual choices over their reproduction with decreased reliance on male partners for financial stability.All these changes favored living arrangement alternatives to marriage.In Central and Eastern Europe, during the late 1980s and early 1990s, there were major political changes, such as the fall of Communist governments.These societies entered a new era of increased social freedom, less rigid rules, and less authoritarian governments.They interacted with Western Europe and some became members of the European Union.