The term mythology can refer either to the study of myths, or to a body or collection of myths. As examples, comparative mythology is the study of connections between myths from different cultures, where as greek mythology is the body of myths from ancient greece. In the field of folkoristics a myth is defined as a sacred narrative explaining how the world and humankind came to be in their present form. Many scholars in other fields use the term "myth" in somewhat different ways. In a very broad sense, the word can refer to any story originating within traditions.
A legend (Latin, legenda, "things to be read") is a narrative of human actions that are perceived both by teller and listeners to take place within human history and to possess certain qualities that give the tale verisimilitude. Legend, for its active and passive participants includes no happenings that are outside the realm of "possibility", defined by a highly flexible set of parameters, which may include miracles that are perceived as actually having happened, within the specific tradition of indoctrination where the legend arises, and within which it may be transformed over time, in order to keep it fresh and vital, and realistic.