Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adjective Arranged in classes or categories.
  • adjective Available to authorized persons only, as for reasons of national security.
  • noun A classified advertisement.

from the GNU version of the Collaborative International Dictionary of English.

  • adjective arranged into classes or categories.
  • adjective assigned to a class of documents withheld from general circulation; -- of information or documents. Opposite of unclassified.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun informal A classified advertisement in a newspaper or magazine.
  • verb Simple past tense and past participle of classify.
  • adjective National security information formally assigned by governments 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.
  • adjective Any information a person or organization does not wish to disclose.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adjective arranged into classes
  • noun a short ad in a newspaper or magazine (usually in small print) and appearing along with other ads of the same type
  • adjective official classification of information or documents; withheld from general circulation

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

classify +‎ -ed

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Examples

  • General Michael Hayden, former head of the CIA and the National Security Agency, told Congress there is too much secrecy within the government cyber community, due to privacy concerns and what he called a "classified culture" at NSA and elsewhere.

    The Australian | News | 2011

  • The Daily Beast last week cited what it called a classified FBI report that estimated China's army has more than 30,000 cyberspies plus more than 150,000 private-sector computer experts assigned to steal U.S. military and technology secrets.

    CEN - Consumer Electronics Net-Technology News 2010

  • The Daily Beast last week cited what it called a classified FBI report that estimated China's army has more than 30,000 cyberspies plus more than 150,000 private-sector computer experts assigned to steal U.S. military and technology secrets.

    Phayul Latest News 2010

  • The Daily Beast last week cited what it called a classified FBI report that estimated China's army has more than 30,000 cyberspies plus more than 150,000 private-sector computer experts assigned to steal US military and technology secrets.

    Moneycontrol Top Headlines 2010

  • Knowing this gentleman's very high status in classified operations, I was surprised that he shared this much with us - and I am sure he would NOT have, if the news media had properly covered the dedication.

    BERNARD RAMSEY 2010

  • Later participation in classified operations has no impact on whether or not a person is listed as a graduate of the training program.

    Heroes or Villains? 2010

  • Later participation in classified operations has no impact on whether or not a person is listed as a graduate of the UDT/SEAL training program.

    Heroes or Villains? 2010

  • Later participation in classified operations has no impact on whether or not a person is listed as a graduate of the training program.

    Heroes or Villains? 2010

  • Later participation in classified operations has no impact on whether or not a person is listed as a graduate of the training program.

    Heroes or Villains? 2010

  • Later participation in classified operations has no impact on whether or not a person is listed as a graduate of the training program.

    Dave M Murphy 2010

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