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

What does aggressor stand for?

English Language Learners Definition of aggressor

: a person or country that attacks another : a person or country that starts a fight or war. See the full definition for aggressor in the English Language Learners Dictionary. aggressor. noun. ag·​gres·​sor | \ ə-ˈgre-sər \

What is an aggressor in a fight?

The aggressor in a fight or battle is the person, group, or country that starts it. They have been the aggressors in this conflict. Synonyms: attacker, assaulter, invader, assailant More Synonyms of aggressor.