hostile UK /ˈhɒstaɪl/US /ˈhɑstəl/adjective 4noun 1forms 3 adjective4 •showing anger or ill will toward someone, and ready to act against themhostile intentions •Aggressive; antagonistic. •Being or relating to a hostile takeover.Microsoft may go hostile in its bid for Yahoo! as soon as Friday, according to a published report. •Unwilling. noun[in the plural]1 •An enemy. formshostiles · more hostile · most hostile