Legal Definitions - FISA

Definition: FISA stands for Foreign Intelligence Surveillance Act. It is a law that allows the United States government to collect information on foreign powers and their agents for national security purposes.

Example: The FBI obtained a FISA warrant to monitor the communications of a suspected Russian spy.

This example illustrates how FISA allows the government to conduct surveillance on foreign agents in order to protect national security. The FBI was able to obtain a warrant to monitor the suspected spy's communications because of the authority granted by FISA.