中文翻译与英英解释

养子。

foster:    vt. 1.养育，抚育〔但并不在法律上认作继承人，与 a ...

son:    n. 1.儿子；〔pl.〕后裔，子孙。 2.国人，国民， ...

someone who is raised as a son although not related by birth
同义词：foster-son,