A (1) : preconceived judgment or opinion (2) : an adverse opinion or leaning formed without just grounds or before sufficient knowledge. B : an instance of such judgment or opinion. C : an irrational attitude of hostility directed against an individual, a group, a race, or their supposed characteristics. (emphasis added)
A : of or relating to an enemy <hostile fire>. B : marked by malevolence : having or showing unfriendly feelings <a hostile act>. C : openly opposed or resisting <a hostile critic> <hostile to new ideas>. D (1) : not hospitable <plants growing in a hostile environment> (2) : having an intimidating, antagonistic, or offensive nature <a hostile workplace>.