Department of Homeland Security(DHS)

Agency

Legal Definition of Department of Homeland Security

federal executive division conceived in the wake of the terrorist attacks of September 11, 2001, to unite domestic national security functions that had previously been spread across some 40 federal agencies into a single, Cabinet-level department. The department became operational in 2003 and its major components include the Transportation Security Administration (TSA), which is responsible for protecting the nation's transportation systems and employs 60,000 security officers, inspectors, air marshals, and staff; U.S. Customs and Border Protection (q.v.), whose functions and staff had been under the former U.S. Customs Service and the former Immigration and Naturalization Service; U.S. Citizenship and Immigration Services (q.v.), which also was a successor agency to the former Immigration and Naturalization Service; U.S. Customs and Immigration Enforcement (ICE), which enforces laws relating to border patrol, customs, trade, and immigration; Federal Emergency Management Agency (FEMA), which aims to reduce the loss of life and property and help communities protect themselves from, prepare for, and respond to natural and man-made hazards and from acts of terrorism; the U.S. Secret Service, an investigative and protective service with responsibilities ranging from currency fraud to protection of the president and other national leaders; and the U.S. Coast Guard (q.v.).

Learn More About Department of Homeland Security

Dictionary Entries Near Department of Homeland Security

Department of Health and Human Services

Department of Homeland Security

Department of Housing and Urban Development

See More Nearby Entries 

Cite this Entry

“Department of Homeland Security.” Merriam-Webster.com Legal Dictionary, Merriam-Webster, https://www.merriam-webster.com/legal/Department%20of%20Homeland%20Security. Accessed 26 Oct. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

WORD OF THE DAY

Test Your Vocabulary

Difficult Spelling Words Quiz

  • alphabet pasta spelling help
  • Which is the correct spelling?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!