verb (used without object)
to live together as if married, usually without legal or religious sanction.
to live together in an intimate relationship.
to dwell with another or share the same place, as different species of animals.
Origin of cohabit
1520–30; < Late Latin cohabitāre, equivalent to co- co- + habitāre to have possession, abide (frequentative of habēre to have, own)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
(intr) to live together as husband and wife, esp without being married
Word Origin for cohabit
C16: via Late Latin, from Latin co- together + habitāre to live
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
euphemism since 1530s to describe a couple living together without benefit of marriage; back-formation from cohabitation. Related: Cohabited; cohabiting.
Online Etymology Dictionary, © 2010 Douglas Harper