1 to make sth change position so that the other side is facing out or upwards 使某物改变位置或翻过来（以使另一边朝外或朝上）: You may now turn over your exam papers and begin. 现在你们可以把试卷翻过来，开始做题了。

2 to keep thinking about sth carefully 反复考虑: She kept turning over what he'd said in her mind. 她在脑子里反复掂量他的话。