classified Meaning, Definition & Usage

1. noun a short ad in a newspaper or magazine (usually in small print) and appearing along with other ads of the same type
   classified ad; classified advertisement.
   
2. verb arrange or order by classes or categories
   sort; separate; assort; sort out; class; classify.
   
   • How would you classify these pottery shards--are they prehistoric?
3. verb declare unavailable, as for security reasons
   classify.
   
   • Classify these documents
4. verb assign to a class or kind
   relegate; classify.
   
   • How should algae be classified?
   • People argue about how to relegate certain mushrooms
5. adjective arranged into classes
   
6. adjective official classification of information or documents; withheld from general circulation
   
   • thousands of classified documents have now been declassified

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