COHABITATION
cohabitation
(noun) the act of living together and having a sexual relationship (especially without being married)
Source: WordNet® 3.1
Etymology
Noun
cohabitation (countable and uncountable, plural cohabitations)
An emotional and physical intimate relationship which includes a common living place and which exists without legal or religious sanction.
The act of living together.
A place where two or more individuals reside together.
(biology) The act of two species living together in the same habitat.
(politics) Cooperation between politicians of opposing political parties; especially, in France, between a President and Prime Minister.
Synonyms
• marriage, civil union
Source: Wiktionary
Co*hab"i*ta"tion, n. Etym: [L. cohabitatio.]
1. The act or state of dwelling together, or in the same place with
another. Feltham.
2. (Law)
Definition: The living together of a man and woman in supposed sexual
relationship.
That the duty of cohabitation is released by the cruelty of one of
the parties is admitted. Lord Stowell.
Source: Webster’s Unabridged Dictionary 1913 Edition