Learner's definition of HOSTILE
[more hostile; most hostile]
1 : of or relating to an enemy 2 : not friendly : having or showing unfriendly feelings
a hostile atmosphere/expression
Her suggestions were given a hostile reception.
an openly hostile critic
It was a small town that was hostile to/toward outsiders.
a hostile witness [=a witness in a legal case who supports the opposing side]
4 business : involving an attempt to buy a company from people who do not want to sell it