A selectable menu item that unfolds into a list of options pertaining to it.

On a web form, where the user chooses from a list of items. For example, if you are asked to identify which country you are from, this will typically be done using a pull-down list. A pull-down list is usually displayed with the first item within a box and a down arrow immediately to the right. Clicking on the down arrow will display the full list to choose from. Search engine spiders can't fill out forms or pull down on lists, so content that is only accessible through pull-down lists will not be indexed and will be part of the "Invisible Web." See also: Nav Bar