U.S. (See quot. 1828.)

a representative of the U.S. federal government, (now) esp. a federal law-enforcement officer.

Chiefly U.S. A legal officer appointed to a judicial district, responsible for executing court precepts, and having duties similar to those of a…

U.S. A law-enforcement officer appointed by the federal government, the governor of a state or territory, or the people of a city.

In singular form federale. A Mexican federal law enforcement agent. Also in extended use: a U.S. federal agent.