Definitions

1. noun

A person or country that starts or takes part in a war or conflict.

“The aggressor nation was accused of violating international law.”

2. noun

A person who aggressively attacks or harasses someone.

“The aggressor in the fight was arrested and charged with assault.”

3. noun

In psychology, a person who has an excessive or uncontrolled impulse to attack or fight.

“The psychologist studied the behavior of the aggressor in the experiment.”

4. verb

To start or take part in a war or conflict.

“The country aggressed against its neighbor, sparking international outrage.”

5. verb

To attack or harass someone aggressively.

“She aggressed against her neighbor, and the police had to intervene.”