1. （无意地）碰撞，冲撞
    If you bump into something or someone, you accidentally hit them while you are moving.

bump是什么意思

    e.g. They stopped walking and he almost bumped into them...
           他们停下了脚步，结果他差点儿撞到他们身上。
    e.g. There was a jerk as the boat bumped against something...
           船撞到什么东西，猛颠了一下。

2. 碰撞；碰撞声
    A bump is the action or the dull sound of two heavy objects hitting each other.

    e.g. I felt a little bump and I knew instantly what had happened...
           我感觉到一点儿轻微的碰撞，便立刻意识到发生了什么。
    e.g. The child took five steps, and then sat down with a bump.
           小孩走了5步，接着扑通一声坐到了地上。

3. （碰撞造成的）肿块，鼓包
    A bump is a minor injury or swelling that you get if you bump into something or if something hits you.

bump在线翻译

    e.g. She fell against our coffee table and got a large bump on her forehead.
           她倒地时撞到我们的咖啡桌上，额头起了个大包。

4. （车辆的）轻微碰撞
    If you have a bump while you are driving a car, you have a minor accident in which you hit something.

bump

5. （地面的）隆起，凸块
    A bump on a road is a raised, uneven part.

    e.g. The truck hit a bump and bounced.
           卡车开过路面上的隆起处，颠了一下。

6. 颠簸而行
    If a vehicle bumps over a surface, it travels in a rough, bouncing way because the surface is very uneven.

    e.g. We left the road, and again bumped over the mountainside...
           我们驶离公路，再次在山腰上颠簸前行。
    e.g. The aircraft bumped along erratically without gathering anything like sufficient speed.
           飞机忽上忽下，飞行很不平稳，根本未达到应有的速度。

7. see also: goose bumps

8. 猛然回到现实中来
    If someone comes down to earth with a bump, they suddenly start recognizing unpleasant facts after a period of time when they have not been doing this.

    e.g. Company bosses have come back down to earth with a bump after a period of post-election euphoria.
           公司老板们在经历了一段选举过后的兴奋之后，重又回到现实中来。

相关词组：bump intobump offbump up