<dfn>

Example

The Document Object Model describes the structure and content for each page in the browser.

Usage

<p>
  The <dfn id="dom">Document Object Model</dfn> describes the structure and
  content for each page in the browser.
</p>

Description

The <dfn> element marks this part of the document as having a definiton of a term. The content inside is the term being defined.

The content of the surrounding block level element such as <p> is inferred to be the definition of that term.

The id attribute allows linking to a specific definition in the document. If a reference to an unfamiliar term such as the DOM comes up later on, the user can be directed straight to its definition.