A Definition List in HTML is used to represent a list of terms along with their corresponding descriptions or definitions. The Definition List is created using the <dl> (Definition List) element, which wraps around one or more pairs of <dt> (Definition Term) and <dd> (Definition Description) elements.

Definition List Example

Here's a simple example to illustrate:

<h1>HTML Definition List</h1>
<dl>
  <dt>HTML</dt>
  <dd>HyperText Markup Language: The standard language for creating web pages.</dd>
 
  <dt>CSS</dt>
  <dd>Cascading Style Sheets: A stylesheet language used for describing the look and formatting of a document written in HTML.</dd>
 
  <dt>JavaScript</dt>
  <dd>A programming language commonly used in web development to add interactive features.</dd>
</dl>

Understanding the example

In this example:

• <dl> is the container for the list.
• <dt> defines the terms that you want to explain.
• <dd> contains the definitions or explanations for the terms.

This creates a clean, organized way to present a list of terms and their corresponding definitions, much like a glossary or dictionary.