An additional domain name added onto your existing account. This domain name is generally used to host a separate website within your main account. You can configure the directory that will serve as this domain name's document root. For instance, you can configure the following:

http://domainpointer.com points to http://maindomain.com/domainpointer

Note that when someone goes to domainpointer.com, they will NOT be redirected to maindomain.com/domainpointer. Rather, they will continue to see domainpointer.com in their browser. They will not be aware that they are visiting a site that is hosted underneath another domain.