Found 2 items, similar to top-secret.
English → English (WordNet) Definition: top-secret top-secret adj : the highest official level of classification of documents
English → English (gcide) Definition: top-secret classified \classified\ adj. 1. arranged into classes or categories; as, unclassified. Syn: categorized. [WordNet 1.5 +PJC] 2. assigned to a class of documents withheld from general circulation; -- of information or documents. Opposite of unclassified. Note: [Narrower terms: eyes-only; confidential; restricted; secret; sensitive; top-secret] [WordNet 1.5]