Definition of hostile

• a. - Belonging or appropriate to an enemy; showing the disposition of an enemy; showing ill will and malevolence, or a desire to thwart and injure; occupied by an enemy or enemies; inimical; unfriendly; as, a hostile force; hostile intentions; a hostile country; hostile to a sudden change.
• n. - An enemy; esp., an American Indian in arms against the whites; -- commonly in the plural.