1. 防水的;不透水的
    Something which is waterproof does not let water pass through it.

    e.g. Take waterproof clothing — Orkney weather is unpredictable...
           带上防水的衣服吧——奥克尼的天气可是变幻莫测的。
    e.g. Designed to be completely waterproof, the lights are manufactured from heavy duty plastic.
           为了彻底防水，这些灯具均采用重型塑料制成。

2. 防水服;雨衣
    Waterproofs are items of clothing which do not let water in.

    e.g. For staying dry you'll want nice lightweight waterproofs to wear over your leathers.
           为了不被淋湿，你需要在皮衣的外面套上一件轻便的防水服。

3. 对…进行防水处理
    If something is waterproofed, it is treated so that water cannot pass through it or damage it.

waterproof什么意思

    e.g. The whole boat has been totally waterproofed...
           整条船全部经过防水处理。
    e.g. Waterproofed fabric pants are more expensive than plastic pants.
           防水纤维短裤比塑料短裤贵多了。