What does Stream of Consciousness mean?

Writing wise it's when you continue to write and you don't stop, you just keep going with what your brain is thinking at the time. Even if your talking about waking up in the morning, and then the next thing you know your talking about your dog. Stream of Conscious books are more polished up because they are edited. A Million Little Pieces for the most part is a great example of stream of conscious writing. Jazz and progressive music, such as tool, would be considered stream of conscious music.