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• Homeland Security
  Homeland Security

  noun

  the United States Department of Homeland Security, the body responsible for dealing with terrorist threats on American soil
• homeland security
  homeland security

  noun

  precautions taken by the government of a specified country against terrorist attacks

Homeland Security

¹ British  

noun

1. the United States Department of Homeland Security, the body responsible for dealing with terrorist threats on American soil

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homeland security ² British  

noun

1. precautions taken by the government of a specified country against terrorist attacks

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Example Sentences

Kerry Doyle, a deputy general counsel for the Department of Homeland Security in the Biden administration, said she’d never heard of someone being detained at a port of entry on suspicion of voting illegally.

From Salon • May 14, 2026

The annual Border Security Expo, a trade show catering to Department of Homeland Security personnel, provides an array of companies showing off the newest, flashiest technology they are eager to sell to the U.S. government.

From The Wall Street Journal • May 8, 2026

The Department of Homeland Security - the agency that helps ward off against cyber attacks - "must immediately help states and localities", Schumer wrote.

From BBC • May 8, 2026

In September 2023, they helped federal investigators in Yakima, Wash., locate two bodies, said Tim Perry, a former federal prosecutor and top Department of Homeland Security official.

From Los Angeles Times • May 7, 2026

“Sorry. Homeland Security doesn’t like it if you overstay your visa.”

From "The Sun Is Also a Star" by Nicola Yoon