Dictionary.com
Thesaurus.com
Synonyms

aggressor

American  
[uh-gres-er] / əˈgrɛs ər /

noun

  1. a person, group, or nation that attacks first or initiates hostilities; an assailant or invader.


Etymology

Origin of aggressor

1670–80; < Late Latin, Latin aggred- (stem of aggredī to attack; see aggress) + -tor -tor

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Witnesses suggested that Tom had acted in self-defense against his aggressor after the two came to blows one day.

From The Wall Street Journal ● Jul. 10, 2026

Verhoeven, in just his second professional boxing fight, was the clear aggressor for long spells, stunning generational great Usyk in a way nobody expected.

From BBC ● May 23, 2026

“Should the enemy attack,” it reads, “our Revolution will defend itself until victory is achieved and the aggressor is expelled.”

From Los Angeles Times ● May 22, 2026

Federal agents claimed he was the aggressor in that incident, but Martinez said neither he nor other members of the group have faced any charges in connection with their work.

From Los Angeles Times ● May 19, 2026

Fired up with the conviction that their cause was a noble one and the enemy an aggressor, they joined the colors and went to war.

From "The War to End All Wars: World War I" by Russell Freedman

Vocabulary.com logo
by dictionary.com

Dictionary.com's Learning Companion

Go beyond just looking up words.
Remember them forever with VocabTrainer.

Start training