Adjective
1. having or showing determination and energetic pursuit of your ends;
"an aggressive businessman""an aggressive basketball player""he was aggressive and imperious; positive in his convictions""aggressive drivers"2. marked by aggressive ambition and energy and initiative;
"an aggressive young exective""a pushful insurance agent""a pushing youth intent on getting on in the world"3. tending to spread quickly;
"an aggressive tumor"4. characteristic of an enemy or one eager to fight;
"aggressive acts against another country""a belligerent tone"