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.
In Second Nature, scientists theorize that Darwin couldn’t help but impose his own heterosexual ideations on animal reproduction, mainly that animals only copulate for the purposes of reproduction, with males being the aggressors and females fluttering their eyelids behind lace fans, or something. Rachel Brodsky, Rolling Stone, 20 June 2026 The inevitable onslaught of factors, including chronic inflammation, oxidative stress, and environmental aggressors, can all influence how skin ages. Deanna Pai, Vogue, 18 June 2026 Collagen-boosting peptides work over time to plump and smooth the appearance of wrinkles, hyaluronic acid hydrates and softens, and a protective cocktail of vitamins A, C, and E shields skin from daily environmental aggressors. Jailynn Taylor, Allure, 13 June 2026 Anthony's attorney, Mike Howard, painted Austin and his twin brother as the aggressors, according to NBC DFW. N'dea Yancey-Bragg, USA Today, 10 June 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 Jun. 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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