---
tag: 0JNXSS9TJ9
kind: concept
name: Universal set
aliases: [universe-of-discourse]
msc: ["03E20"]
sources:
  - url: https://en.wikipedia.org/wiki/Universal_set
    locator: lead section
same_as:
  wikidata: Q1378301
  wikipedia: Universal set
---

## Summary

A universal set is a set that contains all the objects under discussion.
In most set theories, there is no set of all sets, so a universal set is always relative to a context.