LINK

Marked text (usually underlined) or picture within a hypertext  document (Web page). With just one click of your mouse, a link brings you to another Web page (or to another place on the same page). Links are essential in hypertext documents, without links one can hardly speek of "hyper"text.

An active connection to another web page,location in a web page ,file,or other internet resource.Selecting the link takes you to the new location or resource.See URL.

When you're browsing the Web and you see a highlighted and underlined word or phrase on a page, there's a good chance you're looking at a link. These friendly little guys allow you to "jump" to another web site, another frame, or another part of the page you're currently viewing. I think the term "hypertext" comes from the ability of links to quickly send you to another web destination. Just a guess.