from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Containing information whose unauthorized disclosure would pose the gravest threat to national security: authorized for access to top-secret reports.
- adj. Of or relating to top-secret information: top-secret clearance.
- adj. Accessible or known to authorized personnel only: a top-secret reconnaissance mission.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Having the highest secrecy classification.
Sorry, no etymologies found.