Classified things are organized into categories. For example, classified ads in newspapers are arranged by type, with job listings in one section and apartments for rent in another. Classified documents, on the other hand, are for your eyes only. That is, if you have security clearance.

When you classify things, you arrange or sort them into groups, or classes — once this is done, they are classified. Your science book might include sections on animals, classified by species. Sometimes information is categorized as "top-secret," which is another meaning of classified: "I can't show you the classified documents. Only members of the city council can see those."

Definitions of classified
  1. adjective
    arranged into classes
    categorised, categorized
    arranged into categories
    grouped, sorted
    arranged into groups
    see moresee less
    not arranged in any specific grouping
    uncategorised, uncategorized, unsorted
    not categorized or sorted
    show more antonyms...
  2. adjective
    official classification of information or documents; withheld from general circulation
    “thousands of classified documents have now been declassified”
    official classification for documents; meant to be seen by only the person to whom it is directed
    the level of official classification for documents next above restricted and below secret; available only to persons authorized to see documents so classified
    the lowest level of official classification for documents
    the next to highest level of official classification for documents
    of or pertaining to classified information or matters affecting national security
    the highest official level of classification of documents
    see moresee less
    not subject to a security classification
    having had security classification removed
    nonsensitive, unrestricted
    never having had security classification
    show more antonyms...
  3. noun
    a short ad in a newspaper or magazine (usually in small print) and appearing along with other ads of the same type
    synonyms: classified ad, classified advertisement
    see moresee less
    want ad
    a newspaper advertisement stating what is wanted
    type of:
    newspaper ad, newspaper advertisement
    a printed advertisement that is published in a newspaper
Word Family

Test prep from the experts

Boost your test score with programs developed by’s experts.

  • Proven methods: Learn faster, remember longer with our scientific approach.
  • Personalized plan: We customize your experience to maximize your learning.
  • Strategic studying: Focus on the words that are most crucial for success.


  • Number of words: 500+
  • Duration: 8 weeks or less
  • Time: 1 hour / week


  • Number of words: 500+
  • Duration: 10 weeks or less
  • Time: 1 hour / week