1. a person or country that attacks first or starts a fight or war

Examples

• The smaller nation was clearly the victim, not the aggressor.
• International law prohibits countries from acting as aggressors.
• The security footage showed who was the aggressor in the fight.
• The peace treaty required the aggressor to pay reparations.
• Witnesses identified the aggressor in the assault case.
• The aggressor nation faced economic sanctions from the international community.