1. hostile or violent behavior or attitudes toward another
2. the practice of making attacks or encroachments
Usage: often used in military or political contexts
3. assertive, forceful, or attacking behavior
Usage: can be positive in competitive contexts

Examples

• The dog showed signs of aggression when strangers approached.
• Military aggression against neighboring countries was condemned by the UN.
• Her aggression on the basketball court helped her team win.
• The therapy focused on managing his aggressive impulses.
• The company’s aggressive marketing strategy paid off.
• Acts of aggression between the two nations escalated tensions.
• She channeled her natural aggression into competitive sports.