aggressive

adjective ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about aggressive at Wordnik → Where our words come from →

1. Having or showing determination and energetic pursuit of your ends.

   an aggressive businessman

2. Tending to spread quickly.

   an aggressive tumor

3. Characteristic of an enemy or one eager to fight.

   aggressive acts against another country