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Homeland Security

¹ British

noun

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

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

homeland security ² British

noun

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

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Today, nearly all of those people are gone, having resigned, been fired or been reassigned, particularly in the departments of Justice and Homeland Security.

From Salon • Apr. 14, 2026

The BBC has reached out to the US Department of Homeland Security for comment.

From BBC • Apr. 14, 2026

The Department of Homeland Security said it would investigate allegations that Rep. Eric Swalwell hired an undocumented nanny.

From Los Angeles Times • Apr. 13, 2026

Prior to that legislation, only a narrow set of federal agencies — Homeland Security, Justice, Defense — could legally interfere with a hostile drone.

From MarketWatch • Apr. 13, 2026

The Federal Emergency Management Agency had been its own freestanding agency for decades, but after 9/11 had been folded into the Department of Homeland Security.

From "Zeitoun" by Dave Eggers

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023