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counterterrorism

American  
[koun-ter-ter-uh-riz-uhm] / ˌkaʊn tərˈtɛr əˌrɪz əm /

noun

  1. terrorism in reaction to or retaliation for some previous act of terrorism.


counterterrorism British  
/ ˌkaʊntəˈtɛrəˌrɪzəm /

noun

  1. activities that are intended to prevent terrorist acts or to eradicate terrorist groups

"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

Other Word Forms

Etymology

Origin of counterterrorism

First recorded in 1965–70; counter- + terrorism

Explanation

Governments use counterterrorism to fight back against violence that threatens civilians. Counterterrorism ranges from military campaigns to policing websites for hate speech. The term counterterrorism adds counter-, or "against," to terrorism, which derives from a Latin root meaning "to tremble." Protecting civilians from violence, or fighting back against groups that have committed terrorist acts, is what counterterrorism aims to do. Police and military forces often have units dedicated to this, and governments enact counterterrorism measures that include airport security, tightening control of finances, and streamlining communication between different countries.

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Vocabulary lists containing counterterrorism

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.

See Examples For:

On one side there are human rights including women's rights, inclusive governance, and counterterrorism.

From BBC Aug. 14, 2026

“Such incidents divert the attention of the security forces from counterterrorism activities and undermine efforts to maintain security and stability in the area,” it said.

From The Wall Street Journal Aug. 1, 2026

Jordan has been a decades-long military and counterterrorism partner with the United States, opening its territory over the years to U.S. and other Western troops in their engagements throughout the region.

From Los Angeles Times Jul. 28, 2026

As such, transatlantic counterterrorism cooperation could be in for turbulent times.

From Salon Jul. 23, 2026

It was closely followed by a chase car with two agents from the DGSI, the French intelligence agency in charge of counterterrorism.

From "City Spies" by James Ponti

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