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";
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";
characteristic of an enemy or one eager to fight; "aggressive acts against another country"; "a belligerent tone";