ag·​gres·​sor ə-ˈgre-sər How to pronounce aggressor (audio)
: 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 More than a week after the assault by outside aggressors, no one has been arrested. Richard Winton, Los Angeles Times, 16 May 2024 School leaders had her son’s bully sign a stay-away agreement, a document that orders the aggressor to stop certain behaviors, including verbally or physically tormenting another student or threatening them online. Silas Allen, Fort Worth Star-Telegram, 3 May 2024 See all Example Sentences for aggressor 

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'aggressor.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


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

Dictionary Entries Near aggressor

Cite this Entry

“Aggressor.” Dictionary, Merriam-Webster, Accessed 28 May. 2024.

Kids Definition


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

Medical Definition


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

More from Merriam-Webster on aggressor

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