Someone's ex is a person who was their wife, husband, or partner in the past: 2. used to show…. Learn more. According to the DRAE, the prefix ex- is preferred for single words (excapitán - former captain), while ex is preferred for multiword terms (ex primera dama - former first lady) Ex (informal noun): A short form of example. The term ex is widely recognized for its brevity and versatility, often used to indicate past relationships, roles, or examples. ex / ˈ ɛks/ noun plural exes Britannica Dictionary definition of EX [count] informal : a former husband, wife, boyfriend, or girlfriend 356K Share 34M views 8 years ago Provided to YouTube by Universal Music Group EX · Kiana Ledé Bundle your stay with a car rental or flight and you can save more. Search our flexible options to match your needs. The meaning of EX is one that formerly held a specified position or place; especially : a former spouse or former partner in an intimate relationship. How to use ex in a sentence. This disambiguation page lists articles associated with the title EX. If an internal link incorrectly led you here, you may wish to change the link to point directly to the intended article. Someone's ex is the person they used to be married to or used to have a romantic or sexual relationship with. In this article, we'll break down what i.e., e.g., and ex. all stand for and explain how to use each properly in a sentence. We'll also give you some quick tips for remembering which is which.