Not Sign Symbol
¬ is the NOT SIGN, used to indicate negation in logic, text, and technical labels.
U+00AC
The symbol ¬ is widely recognized as the NOT SIGN. It’s commonly used to express negation—“not this” or the logical complement of a statement. Below you’ll find practical ways to copy and use it in your work.
Not Sign Symbol Meaning
The NOT SIGN (¬) represents negation. In logic and computer science, it means “not” or the logical complement, often applied to a condition (e.g., “¬P” meaning “not P”). In technical writing and UI text, it can label actions, toggles, or options where the opposite of a setting is selected (for example, “not enabled” or “disable”). In plain text, it can also be used in discussions of rules, constraints, or filtering logic where you want a compact, consistent symbol.
Common uses
- •Negating a condition in logic expressions (e.g., ¬P, ¬enabled)
- •Labeling UI states such as “not active” or “not enabled”
- •Writing constraints in technical documentation (e.g., “¬allowed”)
- •Representing logical “NOT” in educational materials and diagrams
- •Using in search/filter expressions to indicate exclusion rules
Examples
¬ NOT SIGN Symbol
- ¬¬P means “not P”.
- ¬If enabled is true, then ¬enabled is false.
- ¬Filter results where status ≠ “blocked”: show ¬blocked.
- ¬Toggle: “Show only items that are not archived” (¬archived).
- ¬Rule: reject input if ¬valid.
Variations
Ready to copy
Technical codes
| Unicode | U+00AC | |
| HTML Entity | ¬ | |
| HTML Code | ¬ | |
| CSS | \00AC |
FAQ
What is the symbol ¬ called?
It’s called the NOT SIGN, with Unicode name “NOT SIGN” (U+00AC).
How do I type ¬ on my keyboard?
Typing depends on your OS and keyboard layout. You can copy it from this page, or paste the Unicode character U+00AC.
What does ¬ mean in logic?
It means negation—typically “not” or the logical complement of a statement or condition.
How can I use ¬ in HTML and code?
You can use the HTML entity ¬ or output the Unicode character U+00AC. For CSS, the escape is \\00AC, and for JavaScript you can use \\u{00AC}.