Union Symbol
The ∪ symbol represents a union, commonly used in set theory and math notation.
U+222A
∪ is the Unicode union symbol, named “UNION” (U+222A). It’s widely used to express set union in mathematics and to indicate combining options or collections in writing.
Union Symbol Meaning
The symbol ∪ (U+222A) is read as “union.” In set theory, it combines elements from two or more sets: the union of A and B contains everything that is in A or in B (or in both). In practical writing and diagrams, you may see it used to describe aggregation—such as merging two groups, combining choices, or representing the combined result of multiple sources. In programming and formal contexts, it can appear in math-heavy documentation to indicate the union of collections or sets, especially when notation is preferred over words.
Common uses
- •Writing set union expressions like A ∪ B in math notes and worksheets
- •Labeling combined categories or overlapping groups in diagrams
- •Indicating a merged collection in technical documentation and data definitions
- •Forming clear “either/or/both” statements in explanations of set operations
- •Designing math-themed UI elements, badges, or icons for combined results
Examples
∪ Union Symbol (U+222A)
- ∪A ∪ B includes elements that are in A or B.
- ∪The union of the two sets is written as S ∪ T.
- ∪Choose from options A ∪ B to get the combined list.
- ∪The combined dataset is represented by D1 ∪ D2.
- ∪In the diagram, the overlap is still part of A ∪ B.
Variations
Ready to copy
Technical codes
| Unicode | U+222A | |
| HTML Entity | ∪ | |
| HTML Code | ∪ | |
| CSS | \222A |
FAQ
What does ∪ mean?
∪ is the union symbol. In set theory it means “A or B (or both),” i.e., the set union.
How do I copy and paste ∪?
Copy the character “∪” from this page and paste it into your text editor, document, or design tool.
What is the Unicode information for ∪?
The symbol is named “UNION” with codepoint U+222A. HTML entity: ∪, CSS escape: \\222A, JavaScript escape: \\u{222A}.
Can ∪ be used outside math?
Yes. It can be used visually to suggest combining groups, merging lists, or representing a combined result—especially when the context is mathematical or set-like.