computer language used to create hypertext documents such as Web pages. The author using html marks up or defines how elements of the text will appear on the Web by inserting tags which will be invisible to the ordinary user of that page. The tags are special instructions to the computer, such as to insert a picture or to change text size and style. Tags may also define text or an image as a link to another page (a hyperlink). Word-processing packages can be used to create html documents but there are also many specially designed packages enabling html creation.