Definition

Adjective: The highest official level of classification for information or documents, denoting that its unauthorized disclosure could cause exceptionally grave damage to national security.

Usage

The term "top-secret" is used exclusively as an adjective to classify highly sensitive government or military information. It is typically hyphenated. It modifies nouns like information, document, mission, clearance, or facility. - Only personnel with top-secret clearance can access that server room. - The details of the operation are top-secret. - They are reviewing a set of top-secret files from the archives.

Examples

• The agent was briefed on the top-secret plan.
• This data is classified as top-secret and must not be copied.
• A top-secret meeting was held at the Pentagon.

Advanced Usage

• "above top-secret": An informal term sometimes used to describe information with classification levels or compartments beyond the standard "top-secret" designation, such as sensitive compartmented information (SCI).
  • The intelligence regarding the source is considered above top-secret.

Variants and Related Words

• Classified (adj): Designating information that requires protection, with "top-secret" being the highest common level.
• Secret (adj): An official classification level below "top-secret."
• Confidential (adj): The lowest level of official classification.
• Clearance (n): Official authorization to access classified information (e.g., ).

Synonyms

• Highly classified
• Maximum security (in a classification context)
• Restricted access

Antonyms

• Unclassified
• Declassified
• Public
• Open-source

Related Phrases

• "Need-to-know": A principle applied to top-secret information, meaning access is granted only to individuals who require it to perform their official duties.
  • Even with top-secret clearance, you only get information on a need-to-know basis.
• "Eyes only": A handling caveat often used for top-secret documents, restricting readership to a specifically named individual or list.
  • The memo was marked "Top-Secret - For the Director's Eyes Only."

Adjective

1. the highest official level of classification of documents