1. understand 理解

I don't catch your meaning. 我没听懂你的话。

2. catch one's attention/eye 吸引注意力

Don't try to catch my attention / eye, because it's not gonna work.

3. catch up (抓紧赶上进度)

Hey, it's been a long time. We need to catch up.

Hey, we've been drinking for a long time. You need to catch up.

4. catch up (叙旧)

Hey, it's been a long time. We need to do some catching up.

5. catch a movie 看场电影

Hey, do you wanna catch a movie with me?

6. Catch you later. 回见