1. Arranged into classes
   "The library used a classified system to organize its books"
    
2. Official classification of information or documents; withheld from general circulation
   "thousands of classified documents have now been declassified"

1. A short ad in a newspaper or magazine (usually in small print) and appearing along with other ads of the same type
   "He found his apartment through a classified ad in the local paper";
   - classified ad, classified advertisement

1. Arrange or order by classes or categories
   "How would you classify these pottery shards — are they prehistoric?";
   - class, sort, assort, sort out, separate
    
2. Assign to a class or kind
   "How should algae be classified?";
   - relegate
    
3. Declare unavailable, as for security reasons
   "Classify these documents"

Derived forms: classifieds

See also: categorised [Brit], categorized, confidential, eyes-only, grouped, restricted, secret, sensitive, sorted, top-secret

Type of: assign, attribute, categorise [Brit], categorize, control, newspaper ad, newspaper advertisement, restrict

Antonym: declassify, unclassified

Encyclopedia: Classified