| Main Entry: | Department of Homeland Security |
| Part of Speech: | n |
| Definition: | an executive agency of the US government established on November 25, 2002 with a mission of protecting America and its citizens, esp. from terrorist attacks |
| Example: | The Department of Homeland Security is organized into four divisions: Border and Transportation Security, Emergency Preparedness and Response; Chemical, Biological, Radiological and Nuclear Countermeasures; and Information Analysis and Infrastructure P |
| department of homeland security | |
noun | |
| the federal department that administers all matters relating to homeland security |