An "ex-spouse" refers to a person who was previously married to someone but is no longer in that marital relationship. This term is commonly used to describe individuals who have gone through a divorce or annulment. The relationship between ex-spouses can vary widely, ranging from amicable to contentious, depending on the circumstances of the separation. Ex-spouses may share legal and financial responsibilities, such as child custody and support, especially if they have children together. In many cases, they may need to communicate regularly to co-parent effectively. The term is often used in discussions about family law, divorce proceedings, and personal relationships.