(verb) To change one's beliefs, practices, and self-identity to those of a religion. (noun) One who has changed his or her beliefs, practices, and self-identity to those of a religion.
A broad, diverse group of nations ruled by the government of a single nation.
The historical period generally spanning from the fifth century to the fifteenth century C.E. in Europe and characterized by decreases in populations and the degeneration of urban life.