/ ˈhɒstaɪl; NAmE ˈhɑːstl; -taɪl/ adjective
1.
hostile (to / towards sb/sth) very unfriendly or aggressive and ready to argue or fight :
The speaker got a hostile reception from the audience.
She was openly hostile towards her parents.
2.
hostile (to sth) strongly rejecting sth
SYN opposed to :
hostile to the idea of change
3.
making it difficult for sth to happen or to be achieved :
hostile conditions for plants to grow in
4.
belonging to a military enemy :
hostile territory
5.
( business ) ( of an offer to buy a company, etc. ) not wanted by the company that is to be bought :
a hostile takeover bid
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WORD ORIGIN
late 16th cent.: from French , or from Latin hostilis , from hostis stranger, enemy.