Synonyms|7Antonyms|0|Broader|0Narrower|0Related|0

3 entries under expression topic. ×

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top secret
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under security restrictions(idiom, classified)
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under wraps(noun, classified)
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APASmart Define. (1970). highly classified thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/highly_classified/thesaurus/synonyms
ChicagoSmart Define. 1970. "highly classified thesaurus" https://smartdefine.org/highly_classified/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 1970, highly classified thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/highly_classified/thesaurus/synonyms>.
MLASmart Define. "highly classified thesaurus" 1 January 1970. Web. 24 September 2026. <https://smartdefine.org/highly_classified/thesaurus/synonyms>