: The DFN Element
Last updated: 2026-09-12
<dfn>The DFN Element
Marks the defining instance of a term, usually its first occurrence in the document.
| Category | Formatting |
|---|---|
| Content Model | Phrasing content |
| Allowed Parents | Any element that accepts phrasing content |
| Content Tag | Yes — requires closing </dfn> tag |
| Status | Standard |
📝 Syntax
<dfn>term</dfn>▶ Example
Edit the code below and see the live result in the playground:
🌐 Browser Support
| Browser |  Chrome |
 Edge |
 Firefox |
 Safari |
 Opera |
|---|---|---|---|---|---|
| <dfn> | ✓ v1 | ✓ v12 | ✓ v1 | ✓ v1 | ✓ v1 |
| Supported in all major browsers | |||||
Tip： The parent of <dfn> is treated as the definition context; combine with <abbr> to also mark the abbreviation.
🏷️ Related Tags
💡 Related Cases
📚 Related Tutorials
