Simple Definition of aggressor
: a person or country that attacks another : a person or country that starts a fight or war
Full Definition of aggressor
: one that commits or practices aggression
Examples of aggressor in a sentence
Each country accused the other of being the aggressor.
<these pocket-size states had formed an alliance to deter potential aggressors>
First Known Use of aggressor
AGGRESSOR Defined for Kids
Definition of aggressor for Students
: a person or a country that engages in hostile action without reasonable cause
Seen and Heard
What made you want to look up aggressor? Please tell us where you read or heard it (including the quote, if possible).