or deep Web, Deep Web
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.
Origin of deep web
First recorded in 2000–05
Also called invisible web, Invisible Web.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
computing the part of the World Wide Web not accessible through conventional search engines
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012