What are outbound links?

[seo.gops]

What are outbound links?

[makoo]

An outbound link, also known as an external link, is a link that leads from your website to another website. Someone else's inbound link is your outbound link. An internal link is one that takes readers to another page on the same website.
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[Neo_5678]

Outbound links are links that point from your website to another.

[GeethaN]

A backlink for a given web resource is a link from some other website to that web resource. A web resource may be a website, web page, or web directory. A backlink is a reference comparable to a citation.