#1 aggressive a. 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". wn
#2 aggressive s. [fast-growing, strong-growing] tending to spread quickly; "an aggressive tumor". wn
#3 aggressive s. [belligerent] characteristic of an enemy or one eager to fight; "aggressive acts against another country"; "a belligerent tone". wn
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