a state of deep-seated ill-will
"The old neighbor's hostility toward our family has made it impossible for us to share the community garden without constant arguments."
violent action that is hostile and usually unprovoked
"The neighborhood watch reported a sudden act of hostility when an unknown driver rammed his car into two parked vehicles without any apparent reason."
The state of being hostile.
"The sudden display of hostility from the crowd made him realize he had pushed too far during his speech."