What is an ex?

A former significant other

When a person refers to their ex, they're talking about a former romantic partner. The term ex could refer to a former bf, gf, husband, wife, or non-binary SO.

While the prefix ex- can be applied to most any noun (e.g. ex-mechanic, ex-son-in-law, ex-fisherman), ex as a standalone term always refers to a former partner. Typically, exes are former husbands or wives. Sometimes, however, those who maintained a long-term, unmarried relationship may refer to a former partner as an ex.


"Oh my god, duck. It's my ex."

Some people really don't like their exes

Related Slang


Last Updated: February 5, 2021

Ex definition

This page explains what the slang term "Ex" means. The definition, example, and related terms listed above have been written and compiled by the Slangit team.

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