deep web

or Deep Web

[ deep web ]

noun

1. the portion of the internet that is hidden from conventional search engines, as by encryption; the aggregate of unindexed websites:

   private databases and other unlinked content on the deep web.

deep Web

noun

1. computing the part of the World Wide Web not accessible through conventional search engines

Word History and Origins

Origin of deep web¹

First recorded in 2000–05