The word supernatural is used for things that most people believe are real, but that are not part of nature. Because we cannot prove whether these things are real, people often disagree about these things.
Some say that we should talk about things without talking about the supernatural, because we cannot prove that supernatural things are real. Other people say that although we cannot prove supernatural things in a scientific way, they are real. Many ideas like religion, magic, miracles, spirits, ghosts, angels, devils, gods, and God and telepathy are supernatural.