Outlink term explained
Outlink or external link can be either incoming and outgoing. In the first case, the site refers to external resource, in the second case the external reference means that you refer to an external resource.
When talking about external links, it is necessary to clarify what was going on. Right to use the term outbound link instead of outgoing external link. In the case of an inbound right to use the term reverse link to interlocutors it was clear the subject.