8 entries under idiom topic. ×
| under false pretense(expression, adjective, close, sensitive) | |
| under security restrictions(noun, expression, classified, ranked) | |
| for eyes only(expression, adjective, exceptional, sensitive) | |
| not for publication(expression, adjective, exceptional, sensitive) | |
| off the record(expression, exceptional, secret, private) | |
| on the QT(expression, adjective, sensitive, private) | |
| under the table(expression, adjective, close, sensitive) | |
| with a lid on(expression, adjective, sensitive, sub-rosa) |
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| APA | Smart Define. (2015). top secret thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/top_secret/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "top secret thesaurus" https://smartdefine.org/top_secret/thesaurus/synonyms (accessed September 29, 2026). |
| Harvard | Smart Define 2015, top secret thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/top_secret/thesaurus/synonyms>. |
| MLA | Smart Define. "top secret thesaurus" 14 April 2015. Web. 29 September 2026. <https://smartdefine.org/top_secret/thesaurus/synonyms> |