Definitions:

1. characteristic of an enemy or one eager to fight adjective
   • aggressive acts against another country
2. having or showing determination and energetic pursuit of your ends adjective
   • an aggressive businessman
3. tending to spread quickly adjective
   • an aggressive tumor

Synonyms:

• belligerent
• fast-growing
• strong-growing

NearBy Words:

• aggressively
• aggressiveness