Revels, Master of the, also called Lord of Misrule, in olden times an official attached to royal and noble households to superintend the amusements, especially at Christmas time; he was a permanent officer at the English court from Henry VIII.'s reign till George III.'s, but during the 18th century the office was a merely nominal one.
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Revelation, Book of * Reverberatory Furnace