1 in, on or to the inner part or surface of sth 内部或内面的；在或往内部、里面；在…里面: Is there anything inside the box? 箱子里有没有东西？It's safer to be inside the house in a thunderstorm. 遇有雷暴，留在屋内较安全。We'd better stay inside until the rain stops. 我们最好待在里面，等雨停了再出去。It's getting cold. Let's go inside. 越来越冷了，我们到里边去吧。the inside pages of a newspaper 报纸的内版

2 (formal 正式) (used about time) in less than; within （指时间）少于，在…之内: Your photos will be ready inside an hour. 你的照片一个钟头内可以冲好。

3 (used about information, etc) told secretly by sb who belongs to a group, organization, etc （指信息等）外界不知道的，内幕的: The robbers seemed to have had some inside information about the bank's security system. 看来劫匪掌握了一些有关这家银行保安系统的内情。

4 (slang 俚语) in prison 坐牢；在狱中