Union

A symbol from the Math Symbols collection. Click the symbol or the button below to copy.

Symbol: ∪
Unicode: U+222A
HTML entity: ∪
Category: Math Symbols

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Download Union as a vector SVG or a raster PNG.

PNG size

SVG uses the system font stack — open in any vector editor and convert to outlines if needed. PNGs have a transparent background.

38 of 58 in the math symbols collection

About the union symbol

Representing a fundamental concept in set theory, the Union symbol is shaped like a wide, upward-facing cup. It is formally read as "union" or often simply as "cup" when identifying the glyph's appearance. Historically classified within the Mathematical Operators block, this character serves as a binary operator to indicate the combination of multiple distinct groups into a single collective whole.

Current usage of the symbol is primarily concentrated in formal mathematical notation and logic. It appears frequently in textbooks and digital documents to define the merger of sets, such as writing A ∪ B to denote all elements contained in either set. Outside of pure mathematics, it is used in computer science for database operations and in programming contexts related to discrete structures. In occasional typographic use, it may also appear in specialized diagrams or logic puzzles to represent inclusive connections.

How to type Union

Native keyboard shortcuts for each operating system — derived from the codepoint, so the steps below are always accurate.

Windows

2 options

In Word / Outlook: type 222A then press Alt + X.
Anywhere: press Win + . to open the emoji & symbol picker, then search.

macOS

2 options

Enable “Unicode Hex Input” in System Settings → Keyboard, then hold Option and type 222A.
Or: Control + Command + Space opens the Character Viewer — search by name.