Hi, I wonder what is the difference between the two. In the dictionary I use, they roughly mean the same--at a level of your mind that you are not conscious of. But if they are so close in meaning, while doesn't the dictionary use one word for the explanation of another? By the way, not many phrases or expressions are given under the two. I only see these: subconscious self, subconscious urges subliminal message, subliminal advertising. Can you provide more information or a new angle ?