Meaning of dream when girlfriend is caught talking to another male?

Caught... talking?

I think your use of the verb means you're a bit too much the jealous kind. "Catching" is a Word reserved for when people are being seen in a situation they normally shouldn't be in.

There's absolutely nothing wrong with your girlfriend to talk to other men. If dreaming about it made you sad or even mad, you need to analyse the situation a bit. She's a human being, not a possession, and you see her talking to other boys, you don't "catch" her. The fact that she's with you is proof that, for whatever reason, she's interested in you than more than in any other guy. But she still has her own life too, you're not married or anything.