Definition of cautious. : careful about avoiding danger or risk cautious investors cautious optimism.
37 CFR 5.2 Secrecy order. ( 1 a) When notified by the chief officer of a defense agency that publication or disclosure of the invention by the granting of a patent would be detrimental to the national security, an order that the invention be kept secret will be issued by the Commissioner for Patents.
Possibly the most prototypical examples of secret societies are known as the mystery religions or occult societies. These are religions which attempt (with varying degrees of success) to make secrets out of their central doctrines as well as their procedures and meetings.