The <dfn> tag is used to define the term, that is mentioned for the first time. In the browser, the content of the tag is shown in italic.
The <dfn> tag comes in pairs, which means that the content should be written between the opening (<dfn>) and the closing (</dfn>) tags.
<html> <body> <p><dfn>HTML</dfn> (HyperText Markup Language ) — The standardized markup language for documents on the World Wide Web. Most web pages contain a description of the markup in the language HTML</p> </body> </html>
|title||Specifies the definition of a term (shown when hovering).|
<html> <body> <dfn title="HyperText Markup Language">HTML</dfn> </body> </html>
The <dfn> tag also supports the Global Attributes.