HTML Reference Manual

Comprehensive list of HTML tags

HTML: <dfn> Tag

The <dfn> tag in HTML is used to mark the term being defined in the document. The definition of the term must be found in the parent of the <dfn> tag. Usually, browsers will present the text found in the <dfn> tag as italic text. This tag is also commonly referred to as the <dfn> element.

Online example

Format text in the document:

Example

!doctype html>
<html>
<head>
<meta charset="UTF-8">
<title>HTML5　Usage of <dfn> tag (Basic Tutorial Website oldtoolbag.com)</title>
</head>
<body>
<p><dfn>HTML</dfn> is the technology used to create web pages.</p>
</body>
</html>

Test and see ‹/›

In this HTML5In the document example, we created the <dfn> tag to identify the term 'HTML' defined in the current paragraph tag.

Browser compatibility

IEFirefoxOperaChromeSafari

All mainstream browsers support the <dfn> tag.

Definition and usage instructions for the tag

The <dfn> tag is a phrase tag used to define a definition item.

Tip: We are not against using this label, but if you are just using this label to achieve a certain visual effect, we suggest using CSS, which may achieve richer effects.

All phrase labels:

Label	Description
<em>	Presented as emphasized text.
<strong>	Define important text.
<dfn>	Define a definition item.
<code>	Define computer code text.
<samp>	Define sample text.
<kbd>	Define keyboard text. It indicates that the text is typed from the keyboard. It is often used in documents or manuals related to computers.
<var>	Define variables. You can use this tag in conjunction with <pre> and <code> tags.

The <dfn> element marks the defined term; the term definition should be given in <p>, <section>, or a definition list (usually a pair of <dt>, <dd>).
The value of the defined term is determined by the following rules:
If the <dfn> element has a title attribute, then the value of the term is the value of that attribute.
Otherwise, if it contains only one <abbr> element with a title attribute, then the value of the term is the value of that attribute.
Otherwise, the text content of the <dfn> element is the value of the term.

Global Attributes

<dfn> tag supports HTML Global Attributes.

Event Attributes

<dfn> tag supports HTML Event Attributes.

HTML Tutorial:HTML Text Formatting

HTML: <dialog> Tag HTML: <details> Tag