---
tag: 0X1GSWNBN1
kind: concept
name: Union
msc: ["03E20"]
sources:
  - url: https://en.wikipedia.org/wiki/Union_(set_theory)
    locator: lead section
same_as:
  wikidata: Q185359
  wikipedia: Union (set theory)
---

## Summary

The union of sets is the set of all objects that are elements of at least one of the sets.