aggressor

noun

ag·​gres·​sor ə-ˈgre-sər How to pronounce aggressor (audio)
Synonyms of aggressornext
: one that commits or practices aggression

Examples of aggressor in a Sentence

Each country accused the other of being the aggressor. a group of smaller states had formed an alliance to deter potential aggressors
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Attorneys offer competing descriptions of fights Attorneys for Paul and Mortensen offered competing versions of fights between the pair, with each suggesting the other party was the aggressor. Hannah Schoenbaum, Chicago Tribune, 1 May 2026 Wicker said Iran was part of an axis of aggressors with China, Russia and North Korea. Chris Boccia, ABC News, 30 Apr. 2026 Based on her statements and the physical evidence, officers determined Hasford to be the primary aggressor, according to the report reviewed by PEOPLE. Angelique Brenes, PEOPLE, 30 Apr. 2026 Each side said their civilians are being killed and each denies being the aggressor. CBS News, 29 Apr. 2026 See All Example Sentences for aggressor

Word History

Etymology

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

First Known Use

1585, in the meaning defined above

Time Traveler
The first known use of aggressor was in 1585

Browse Nearby Words

Cite this Entry

“Aggressor.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/aggressor. Accessed 5 May. 2026.

Kids Definition

aggressor

noun
ag·​gres·​sor ə-ˈgres-ər How to pronounce aggressor (audio)
: a person or country that attacks without reasonable cause

Medical Definition

aggressor

noun
ag·​gres·​sor ə-ˈgres-ər How to pronounce aggressor (audio)
: one who exhibits aggression

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