1. 呈交；交上(试卷等)：例句:You must give in your examination papers now.你们现在必须把你们的试卷交上来。
2. 登记，报上(姓名等)：例句:Give in your name if you are willing to help.假如你愿意帮忙，就报上你的姓名。
3. 投降，屈服；让步，认输：例句:He was compelled to give in.他被迫屈服。
4. 塌陷；垮：例句:The ground gave in under the weight of the heavy car.地面在沉重的汽车的重压下塌陷了。in作副词。