An "Ex-Girlfriend" refers to a woman who was previously in a romantic relationship with someone but is no longer together with that person. This term is commonly used to describe a past partner, and the relationship may have ended for various reasons, such as personal differences, life changes, or mutual agreement. The concept of an ex-girlfriend can evoke a range of emotions, including nostalgia, regret, or relief, depending on the circumstances of the breakup. People often reflect on their experiences with an ex-girlfriend when considering lessons learned in relationships or when moving on to new romantic interests, such as a current girlfriend.