Of or pertaining to an enemy: as, hostile ground.Of inimical character or tendency; having or exhibiting enmity or antagonism; antagonistic: as, a hostile manifesto; hostile criticism.Synonyms Averse, Adverse, Inimical, Hostile; unfriendly, warlike. Averse applies to feeling, adverse to action: as, I was very averse to his going; an adverse vote; adverse fortune. Inimical expresses both feeling and action, generally in private affairs. Hostile also expresses both feeling and action, but applies especially to public affairs; where it applies to private matters, it expresses either strong or conspicuous action or feeling, or both, or all.n. An enemy: specifically, in the United States, a hostile Indian; an Indian who is engaged in warfare against the whites.