classified
adjective
uk/ˈklæsɪfaɪd/ usclassified documents and information are officially kept secret and can only be seen by people who have high authority or special permission:
Security employees discovered that classified information and passwords had been leaked onto the internet.
classified evidence/material/records
He was caught taking highly classified documents from the National Archives.
[ before noun ]
relating to the small advertisements in newspapers, magazines, or on websites that offer jobs or to sell or buy things:
The help-wanted classified sections are overflowing with ads for managers.
used to describe information that is arranged by type:
Classified data will increase 50% a year as more economies begin using broadband technology.
The classified catalogue tells you which publications on a particular subject are available in the library.