The agency of the U.S. government that monitors the border to prevent illegal goods from crossing it and to collect tariffs -- customs duties -- on legal goods that are subject to them.
U.S. governmental agency whose primary duties include the assessment and collection of all duties, taxes and fees on imported merchandise, and the enforcement of customs and related laws and treaties.
The United States Customs Service was the portion of the U.S. Federal Government dedicated to keeping illegal products outside of U.S. borders. It also regulated what could leave the United States and was partially responsible for who could enter the United States.