ag·​gres·​sor | \ ə-ˈgre-sər How to pronounce aggressor (audio) \

Definition of aggressor

: one that commits or practices aggression

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Synonyms for aggressor


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Examples of aggressor in a Sentence

Each country accused the other of being the aggressor. these pocket-size states had formed an alliance to deter potential aggressors
Recent Examples on the Web The rulings are a blow to the defense, and could hinder their efforts to portray Arbery as the aggressor. Shaddi Abusaid, ajc, 7 Oct. 2021 The report indicated officers on scene had viewed Petito as the aggressor. NBC News, 21 Sep. 2021 From 2005 to 2007, for example, the Swedish submarine Gotland acted as an aggressor submarine for the Navy. Kyle Mizokami, Popular Mechanics, 15 July 2021 The use of force by nations against other nations would be banned, and aggressor nations would be disarmed. Dan Reed, Forbes, 15 June 2021 Officers eventually decide Petito was the aggressor. Alia E. Dastagir, USA TODAY, 21 Sep. 2021 Rudloff has denied wrongdoing, saying the protester was the aggressor. Madi Alexander, Dallas News, 21 Sep. 2021 Silva allowed Ortiz to be the aggressor as the fight began and drew him into a corner. Josh Peter, USA TODAY, 12 Sep. 2021 In each case, Mensah-Stock was the aggressor, scoring early and often with takedowns and reversals and controlling the tempo. David Barron, San Francisco Chronicle, 4 Aug. 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'aggressor.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of aggressor

1585, in the meaning defined above

History and Etymology for aggressor

borrowed from Latin, "attacker, assailant," from aggredī, adgredī "to approach, attack" + -tor, agent suffix — more at aggress

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Time Traveler for aggressor

Time Traveler

The first known use of aggressor was in 1585

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Statistics for aggressor

Last Updated

24 Oct 2021

Cite this Entry

“Aggressor.” Dictionary, Merriam-Webster, Accessed 28 Oct. 2021.

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More Definitions for aggressor



English Language Learners Definition of aggressor

: a person or country that attacks another : a person or country that starts a fight or war


ag·​gres·​sor | \ ə-ˈgre-sər How to pronounce aggressor (audio) \

Kids Definition of aggressor

: a person or a country that engages in hostile action without reasonable cause


ag·​gres·​sor | \ ə-ˈgres-ər How to pronounce aggressor (audio) \

Medical Definition of aggressor

: one who exhibits aggression

More from Merriam-Webster on aggressor

Nglish: Translation of aggressor for Spanish Speakers

Britannica English: Translation of aggressor for Arabic Speakers


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