在定义列表中，每个列表项都可以包含<dt>和<dd>元素。<dt>代表定义术语，就像字典一样，这是正在定义的术语（或短语）。随后，<dd>是<dt>的定义。您可以使用dl-horizontal类在<dl>中并排排列术语和描述。
您可以尝试运行以下代码来实现dl-horizontal类：
<!DOCTYPE html> <html> <head> <title>Bootstrap lists</title> <meta name = "viewport" content = "width=device-width, initial-scale = 1"> <link rel = "stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css"> <script src = "https://cdn.staticfile.org/jquery/3.3.1/jquery.min.js"></script> <script src = "https://stackpath.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script> </head> <body> <h1>Lists</h1> <h2>Fruits (Ordered List)</h2> <ol> <li>Kiwi</li> <li>Apple</li> <li>Mango</li> </ol> <h2>Vegetables (UnOrdered List)</h2> <ul> <li>Tomato</li> <li>Brinjal</li> <li>Broccoli</li> </ul> <h2>Horizontal Definition List</h2> <dl class = "dl-horizontal"> <dt>Description 1</dt> <dd>Item 1</dd> <dt>Description 2</dt> <dd>Item 2</dd> </dl> </body> </html>