HTML Elements Reference: DFN Element

Indicates the defining instance of a term.

HTML 2, 3.2, 4, 4.01, 5

<dfn> ... </dfn>

NOTE: Both start and end tags are required.

The <dfn> HTML element indicates a term to be defined.

The title attribute may be used to show the meaning or definition of the <dfn> element when a user’s mouse hovers over the element.

To enable the definition to be a destination link, the dfn element must be assigned a unique id, which can then be the destination of an <a> element, the href attribute of which points to the fragment identifier.

The content within the <dfn> ... </dfn> tags typically render in italics.

The <dfn> element has no attribute of its own, but supports global attributes common to all HTML elements.

The following example shows how the <dfn> element may be used.

<p>The <dfn title="Hubble Space Telescope">HST</dfn> is among the most productive
   scientific instruments ever constructed.

which would render on a Web page as follows:

The HST is among the most productive scientific instruments ever constructed.

4.5.8 The dfn element

ABBR DD DL DT

Elements

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<dfn> Element

Remarks

Attributes

Example

External References

See Also