/ˈfɒstə(r); US ˈfɔ:- ||; ˈfɔstɚ/verb[T] 1 (especially Brit 尤为英) to take a child who needs a home into your family and to care for him/her without becoming the legal parent 寄养育，寄抚养（抚养别人的孩子，但不作为法律上的父母）: to foster a homeless child 抚育一个无家可归的孩子
The people who do this are foster-parents. The child is a foster-child. Look at adopt. 寄养父母叫做foster-parents，寄养子女叫做foster-child。参看adopt。 2 to help or encourage the development of sth (especially feelings or ideas) 促进发展（尤指感情、思想）: to foster sb's friendship/trust 促进某人的友谊╱信任