What is the meaning of the word "hostile"?

Definitions:

characterized by enmity or ill will adjective
- a hostile nation
impossible to bring into friendly accord adjective
- hostile factions
not belonging to your own country's forces or those of an ally adjective
- hostile naval and air forces
troops belonging to the enemy's military forces noun
- the platoon ran into a pack of hostiles
unsolicited and resisted by the management of the target company ( used of attempts to buy or take control of a business) adjective
- hostile takeover
very unfavorable to life or growth adjective
- a hostile climate