Dynamic Hypertext Markup Language

Definition
Dynamic Hypertext Markup Language (DHTML) is

"[a]n extension of Hypertext Markup Language (HTML, providing more control over the appearance and position of elements on a Web page. DHTML is considered "dynamic" because it provides a way to include elements on a Web page that download to a user's Web browser along with the page but do not become visible until the user interacts with them. This means that when the user interacts with the elements, they activate without requiring any action from the Web site's server."