CLASSIFIED
classified
(adjective) arranged into classes
classified
(adjective) official classification of information or documents; withheld from general circulation; “thousands of classified documents have now been declassified”
CLASSIFY
classify, class, sort, assort, sort out, separate
(verb) arrange or order by classes or categories; “How would you classify these pottery shards--are they prehistoric?”
relegate, classify
(verb) assign to a class or kind; “How should algae be classified?”; “People argue about how to relegate certain mushrooms”
classify
(verb) declare unavailable, as for security reasons; “Classify these documents”
Source: WordNet® 3.1
Etymology 1
Verb
classified
simple past tense and past participle of classify
Adjective
classified (comparative more classified, superlative most classified)
Sorted into classes or categories
Formally assigned by a government to one of several levels of sensitivity, usually (in English) top secret, secret, confidential, and, in some countries, restricted; thereby making disclosure to unauthorized persons illegal.
Not meant to be disclosed by a person or organization.
Etymology 2
Noun
classified (plural classifieds)
(informal) A classified advertisement in a newspaper or magazine.
Source: Wiktionary
CLASSIFY
Clas"si*fy, v. t. [imp. & pp. Classified; p. pr. & vb. n.
Classifying.] Etym: [L. classis class +
Definition: To distribute into classes; to arrange according to a system;
to arrnge in sets according to some method founded on common
properties or characters.
Syn.
– To arrange; distibute; rank.
Source: Webster’s Unabridged Dictionary 1913 Edition