1. ready or likely to attack or confront; hostile or violent
2. pursuing one’s aims and interests forcefully, sometimes unduly so
3. characterized by or resulting from aggression

Examples

• The dog became aggressive when strangers approached.
• She used aggressive tactics to win the business deal.
• His aggressive driving caused several accidents.
• The team played with aggressive defense throughout the game.
• The cancer required aggressive treatment.
• He was too aggressive in his sales approach.
• The aggressive behavior was completely unacceptable.