adj 1  :  tending toward or exhibiting aggression < behavior>   2  :  growing, developing, or spreading rapidly < bone tumors>   3  :  more severe, intensive, or comprehensive than usual esp. in dosage or extent < chemotherapy>  < surgical intervention>  - compare INTENSIVE  ag*gres*sive*ly adv ag*gres*sive*ness n ag*gres*siv*i*ty n pl  -ties  
 
 
 
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