An action, situation, emotion, or idea that is justifiable is acceptable or correct because there is a good reason for it.
例句
The violence of the revolutionary years was justifiable on the grounds of political necessity.出于政治需要，革命年代的暴力行为是情有可原的。...the strong and justifiable desire of the Baltic States for independence.波罗的海诸国要求独立的强烈而正当的愿望
英汉词典释义
adj.
可证明为正当的;有理由的
The jury returned a verdict of justifiable homicide.陪审团作出了正当杀人的裁决。The cutbacks are justifiable on the grounds of cost.削减符合成本方面的考虑。The rule is justifiable on safety grounds.出于安全方面的考虑，这一规定是合理的。