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.
Her journey towards long-lasting sobriety aligns with her unfolding detective work to find her anonymous aggressor. Courtney Howard, Variety, 15 Mar. 2026 The attack on the oil depots could be construed as chemical warfare, which violates international law, because the aggressors likely knew the hazards the civilians who live in Tehran would face, Cleetus said. Julia Jacobo, ABC News, 10 Mar. 2026 Brazil’s government announced emergency measures including a national task force to execute arrest warrants, electronic tracking for aggressors and mobile units assisting women experiencing violence. Eléonore Hughes, Los Angeles Times, 9 Mar. 2026 An aggressor nation that kills people on Caribbean fishing boats without evidence or due process. Jill Lawrence, Mercury News, 7 Mar. 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 21 Mar. 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

More from Merriam-Webster on aggressor

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