Definitions of referer is:
noun Technical meaning of referer
(web) A misspelling of "referrer" which somehow made it into the HTTP standard. A given web page's referer (sic) is the URL of whatever web page contains the link that the user followed to the current page. Most browsers pass this information as part of a request.
Misspelling of referrer.
(Internet) the referring page; the URL that referred to a given page.
Other words based on referer: