Here is the Webster definition:

Main Entry: ag·gres·sive
Pronunciation: \ə-ˈgre-siv\
Function: adjective
Date: 1824
1 a : tending toward or exhibiting aggression <aggressive behavior> b : marked by combative readiness <an aggressive fighter>
2 a : marked by obtrusive energy b : marked by driving forceful energy or initiative : enterprising <an aggressive salesman>
3 : strong or emphatic in effect or intent <aggressive colors> <aggressive flavors>
4 : growing, developing, or spreading rapidly <aggressive bone tumors>
5 : more severe, intensive, or comprehensive than usual especially in dosage or extent <aggressive chemotherapy>

— ag·gres·sive·ly adverb

— ag·gres·sive·ness noun

— ag·gres·siv·i·ty \ˌa-ˌgre-ˈsi-və-tē\ noun


If you ask me....I have a female that when I open her cage is ready to strike. Yes I'm in her cage, but, she is still "marked by combative readiness". Sounds like even ball pythons can be aggressive.