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1. A disposition to behave aggressively
    
2. A feeling of hostility that arouses thoughts of attack
   - aggressiveness
    
3. Violent action that is hostile and usually unprovoked
   - hostility
    
4. The act of initiating hostilities
    
5. Deliberately unfriendly behaviour

Derived forms: aggressions

Type of: action, armed combat, behavior [US], behaviour [Brit, Cdn], combat, conduct, doings, enmity, hostility, ill will, unfriendliness

Part of: war, warfare

Encyclopedia: Aggression