*in·side²/ɪn`saɪd; ɪnˈsaɪd/ n 1 the inside the part of something that is inside 内部，里面: The inside of the car was filthy. 这辆车里面脏极了。 2 inside out with the usual outside parts on the inside 里朝外: Your shirt is inside out. 你的衬衫里外弄反了。 3 know/learn sth inside out to know everything about a subject 对某事知道得一清二楚/了如指掌: She knows the business inside out. 她对这种业务了如指掌。