1. 皮卡；轻型货车
A pick-up or a pick-up truck is a small truck with low sides that can be easily loaded and unloaded.

2. （贸易或经济的）好转，改善
A pick-up in trade or in a country's economy is an improvement in it.

3. 接人；取走物品；提货
A pick-up takes place when someone picks up a person or thing that is waiting to be collected.

4. （以发生性关系为目的的）搭识，搭讪
When a pick-up takes place, someone talks to a person in a friendly way in the hope of having a casual sexual relationship with them.