Designating a person who claims (falsely or erroneously) to receive divine communication or inspiration; designating (a member of) any of various Christian religious movements believing in, or thought to believe in, private divine revelation as opposed to revelation through scripture; of, relating to, or characterized by such movements or their beliefs. From the 18th century also in wider sense: relating to, of the nature of, or characterized by mystical, fanatical, or radical religious delusion; = "enthusiastic".

Full of or characterized by passion, eagerness, or keen interest; ardent, avid; energetic. Compare "enthusiastic" 3b.