HTML <Dfn> Tag

Definition

The <dfn> tag is used to specify a term that is defined in the content of your web page.

Example

<p>A <dfn>WYSIWYG</dfn> is a graphical interface that allows you to
modify content on your website without any HTML knowledge.</p>

Usage

• The nearest ancestor or parent of the <dfn> element must contain the definition of the term given by the <dfn> element.
• If the <dfn> element has a title attribute then the value of that attribute must match precisely the term being defined.

  <p>A <dfn title="What You See is What You Get">WYSIWYG</dfn> is a graphical interface 
  that allows you to modify content on your website without any HTML knowledge.</p>

• If the <dfn> element contains a single child <abbr> element that has a title attribute, and no other text, then the <abbr>’s title element is the term being defined.

  <p>A <dfn><abbr title="What You See is What You Get">WYSIWYG</abbr></dfn> is a 
  graphical interface that allows you to modify content on your website without any 
  HTML knowledge.</p>

  See the <abbr> element for more examples of using abbreviations and definitions together.
• Otherwise, the content of the <dfn> element gives the term being defined.

Attributes

The <dfn> element only supports the Global Attributes.

Specification

• HTML Living Standard Specification
• HTML5 Specification

Browser Support

Desktop

Mobile