What is a Ba?

You guys probably think that a Ba is something that a sheep does but actually the Egyptians believe it's the part of your body that travels when you sleep. So what they're trying to say is that when you think you're dreaming your Ba is actually traveling around sort of weird to take in if you ask me. Also some Egyptians believe that when you sleep the Egyptian gods can talk to you through your Ba when you're dreaming. Although the idea of a Ba is a pretty neat idea I still think i would stick to the idea of dreaming.