Definitions for "Back Link"
Keywords:  inbound, ibl, seo, link, website
A link pointing at a given site or page from a different site or page. Same as an "Inbound Link"
If page A links to page B, then a 'back link' would be a link which goes back to page A from page B. Inbound links pointing to a page are referred to as back links. This is mainly to do with SEO. The number of backlinks your site has can increase it's position in the search engines and affect the phrases it is listed under although it's not strictly necessary to build up backlinks in order to rank well.
A link in one direction implied from the existence of an explicit limk in the other direction. See: Building back-links