




HTML <dfn> tag
HTML <dfn> tag also called as HTML definition tag. It is used to represent the term which is defined within context of definition phrase or sentence in an HTML document. The defining instance term usually the first term in a document. 
If a term is contained within the <dfn> element then browser understands that nearby text is the definition of the term. 
Syntax


<dfn>Content......... </dfn>


Following are some specifications about the HTML <dfn> tag


Display
Inline


Start tag/End tag
Both Start and End tag


Usage
Textual


Example


<!DOCTYPE html>

<html>

<head>

<title>Dfn tag</title>

</head>

<body>

<h2>Example of dfn Tag</h2>

<p><dfn>HTML</dfn> A markup language for Web designing</p>

</body>

</html>



Output:

Using title attribute:


<!DOCTYPE html>

<html>

<head>

<title> Dfn tag</title>

</head>

<body>

<h2>Example of dfn Tag</h2>

<p> <dfn title="Transmission control protocol">TCP</dfn> is one of the main protocol of Internet protocols, used to interconnect network devices over the Internet</p>

</body>

</html>



Output:

Attribute
Tag-specific attribute


Attribute
Value
Description


title

It specifies the definition of the term, and it shows when mouse hover on it.


Global attribute
HTML <dfn> tag supports the global attributes in HTML
Event attribute
HTML <dfn> tag supports the event attributes in HTML. 
Supporting Browsers

Element Chrome IE Firefox Opera Safari
<dfn>YesYesYesYesYes














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