1. the quality or state of being ready or likely to attack or confront; combative behavior or attitude
2. vigorous or forceful pursuit of a goal or objective; determined and energetic action

Examples

• The player's aggressiveness on the field helped his team win the game.
• Her aggressiveness in negotiations secured a better deal for the company.
• The dog showed signs of aggressiveness toward strangers.
• The coach praised the team's aggressiveness in the second half.
• His aggressiveness in pursuing his dreams inspired others.
• The company's marketing aggressiveness helped it capture market share.
• Excessive aggressiveness can damage relationships and teamwork.