to put something into a bag or container, or to put something in the place where it is usually kept

Come on, children, it's time to pack away your toys. 好了，孩子们，该把你们的玩具收拾起来了。

to eat a lot of food

She's tiny but she can really pack away the biscuits. 她是个小不点儿，不过她的确能吃掉那些饼干。