A more thorough explanation:

Definition: Semi-matrimonium is a Latin term that refers to a half-marriage.

Example: A couple who lives together but is not legally married can be considered to be in a semi-matrimonium relationship.

Explanation: Semi-matrimonium is a term used to describe a relationship that is not quite a marriage but has some similarities to one. For example, a couple who lives together and shares expenses may be considered to be in a semi-matrimonium relationship. However, they do not have the legal rights and responsibilities that come with a marriage, such as inheritance rights or the ability to make medical decisions for each other.