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.
Secret police (sometimes called political police) are intelligence services or police and law enforcement agencies which operate in secrecy, and therefore have little to no transparency, accountability or oversight. An alternative name is secret service. A secret police organization is often used beyond the law by totalitarian states to protect the political power of an individual dictator or an authoritarian (autocracy) political regime.