443f18ee_ndard_Metrics___Analytics_Talk__WAA_Definition
[Compliant] N/a [Term] External Referrer [GA Definition] N/a This metric is not available in GA. See definition of Referrer above. [WAA Definition] 
The external referrer is a page URL where the traffic is external or outside of the website or a web property defined by the user.
Google Analytics Compliance with WAA Standard Metrics - Analytics Talk
WAA Definition