From Longman Dictionary of Contemporary Englishcohabitco‧hab‧it /kəʊˈhæbɪt $ koʊ-/ verb [intransitive] LIVE WITH somebodyto live with another person and have a sexual relationship with them without being married SYN live together —cohabitation /kəʊˌhæbɪˈteɪʃən $ koʊ-/ noun [uncountable]→ See Verb table
Examples from the Corpus
cohabit• Why, for instance, would two individuals want to form a legal marriage instead of simply cohabiting?• The same might just as well be true, however, of unmarried cohabiting couples and of couples who do not cohabit.• Only about one in three couples who cohabit end up getting married.• They met in 1968 and began to cohabit in 1969, although they did not marry until 1978.• Does she welcome the intruder and discuss how best they can cohabit the territory, sharing prey?• Most divorcees either remarry or cohabit with another partner.• Falling in love with her beauty, he cohabited with her; then he left and forgot the whole affair.Origin cohabit (1500-1600) Late Latin cohabitare, from Latin co- ( → CO-) + habitare ( → HABITATION) 