adj.
1.not open or public
2.conducted with or marked by hidden aims or methods
3.not openly made known
4.communicated covertly
5.not expressed
6.designed to elude detection
7.hidden from general view or use
8.(of information) given in confidence or in secret
9.indulging only covertly 10.having an import not apparent to the senses nor obvious to the intelligence 11.the next to highest level of official classification for documents secret n.
1.something that should remain hidden from others (especially information that is not to be passed on)
2.information known only to a special group
3.something that baffles understanding and cannot be explained
