Mu (무) is an ancient Korean word defining a shaman in the Korean traditional religion. Korean shamans hold rituals called gut (literally "good") for the welfare of the individuals and the society. In modern Korea different terms are used to define shamans, including mudang (mostly for females), baksu (only for males), tangol (for hereditary shamans) and musogin ("people who do shamanism", used in the context of organised shamanism).