1. 瞥；偷看；窥视
    If you peep, or peep at something, you have a quick look at it, often secretly and quietly.

    e.g. Children came to peep at him round the doorway...
           孩子们围在门口偷看他。
    e.g. Now and then she peeped to see if he was noticing her.
           她时不时地偷眼看他是否在注意自己。

2. （从隐蔽处）隐现，微微露出
    If something peeps out from behind or under something, a small part of it is visible or becomes visible.

    e.g. Purple and yellow flowers peeped up between rocks...
           岩石间隐约可见紫色和黄色的花儿。
    e.g. Here and there a face peeped out from the shop doorway.
           商店门口从不同方向露出一张脸。

3. 没听到任何话（或动静）
    If you say that you don't hear a peep from someone, you mean that they do not say anything or make any noise.

    e.g. You don't hear a peep from her once she's gone to bed.
           她一睡觉，就不会发出一点儿动静。