aggressor

noun

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
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.
Ukraine demonstrates that wars are never won as rapidly as aggressors imagine before the conflict. Michael Brown, Forbes.com, 20 July 2025 The aggressor, who has not yet been arrested, primarily has targeted people who were jogging or walking alone, police said. Rick Hurd, Mercury News, 16 July 2025 The argument has been made that the application of the death penalty represents the legitimate self-defense of society from an unjust aggressor — that is, the murderer. Thomas Wenski, Sun Sentinel, 13 July 2025 In field trials where two females were placed on an empty web, researchers saw one fight (7%) where the aggressor ended up killing and wrapping the other spider in silk. Rick Sobey, Boston Herald, 11 July 2025 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 29 Jul. 2025.

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

More from Merriam-Webster on aggressor

Last Updated: - Updated example sentences
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