Found 1 items, similar to Top secret.
English → English (gcide) Definition: Top secret Top secret \Top" sec`ret\, a. 1. (Mil.) containing information whose disclosure could result in grave danger to the national security; -- the highest of the three commonly known levels of national security classification, the others being confidential and secret. Note: The names of the higher levels of secrecy classification are themselves classified secrets. [PJC] 2. kept secret by very careful and strict rules for disclosure. [PJC]