1. Denoting aggression. 2. Denoting a competitive forcefulness or invasiveness, as of a behavioral pattern, a pathogenic organism, or a disease process.
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ag·gres·sive ə-'gres-iv adj
1) tending toward or exhibiting aggression <\aggressive behavior>
2) growing, developing, or spreading rapidly <\aggressive bone tumors>
3) more severe, intensive, or comprehensive than usual esp. in dosage or extent <\aggressive chemotherapy> <\aggressive surgical intervention> compare conservative
ag·gres·sive·ly adv
ag·gres·sive·ness n
Medical dictionary. 2011.