同居，是指两个人出于某种目的而暂时居住在一起，现一般用于异性之间。同居跟结婚不一样，结婚是获得了法律承认的夫妻关系，是不可以随便解除关系而必须要通过一定的法律程序；而同居是不被法律承认的一种行为，可以随时出于当事人的意愿而终止关系。同居各方都没有任何法律保障。那么，同居英文怎么说呢？
[图片0] Realize New Cohabitation Era 新同居时代 Today, cohabitation is a common pattern among people in the Western world. People may live together for a number of reasons. These may include wanting to test compatibility or to establish financial security before marrying. It may also be because they are unable to legally marry, due to reasons such as same-sex; some interracial or inter-religious marriages are not legal or permitted. Other reasons include living as a way for polygamists to avoid breaking the law, or as a way to avoid the higher income taxes paid by some two-income married couples (in the United States), negative effects on pension payments (among older people), or philosophical opposition to the institution of marriage (that is, seeing little difference between the commitment to live together and the commitment to marriage). Some individuals also may choose cohabitation because they see their relationships as being private and personal matters, and not to be controlled by political, religious or patriarchal couples prefer cohabitation because it does not legally commit them for an extended period, and because it is easier to establish and dissolve without the legal costs often associated with a divorce. In some jurisdictions cohabitation can be viewed legally as common-law marriages, either after the duration of a specified period, or the birth of the couple’s child, or if the couple consider and behave accordingly as husband and wife. (This helps provide the surviving partner a legal basis for inheriting the deceased’s belongings in the event of the death of their cohabiting partner.) In Saskatchewan, Canada, a married person may cohabit with other married or single persons and become the spouses of all of them under the Saskatchewan Family Property Act. Consent of the “subsequent spouse” is not required. Although Canada has a federal criminal code law prohibiting polygamy, which includes anyone who authorizes more than one conjugal union at a time, Saskatchewan judicial authorities that unilaterally authorize multiple conjugal unions have not yet been charged under this federal law. 在最近一项有一万五千余城市男女参加的网络调查中，有%的人承认有过婚前同居的经历，其中六成以上的人对那段经历丝毫没有后悔，即使没有结果，大部分人也认为同居生活那一段是非常美好的回忆。同居由未婚同居，到试婚，再到婚前同居，名词的感情色彩越来越平和而简单。如今人们的观念越来越豁达，同居已是再正常不过的事，两个相爱的人住在一起，女人为对方收拾衣物，男人的手臂成为对方的枕头，最后就算因各种原因未能执子之手，与子偕老，也有着很多难以忘怀的生活片段。