non-cohabitation

verb (used without object)

1. to live together as if married, usually without legal or religious sanction.
2. to live together in an intimate relationship.
3. to dwell with another or share the same place, as different species of animals.

verb

1. (intr) to live together as husband and wife, esp without being married

v.euphemism since 1530s to describe a couple living together without benefit of marriage; back-formation from cohabitation. Related: Cohabited; cohabiting.