(1):
(n.) A patron deity or presiding genius.
(2):
(n.) A sole or supreme ruler; a sovereign; the highest ruler; an emperor, king, queen, prince, or chief.
(3):
(n.) One superior to all others of the same kind; as, an oak is called the monarch of the forest.
(4):
(n.) A very large red and black butterfly (Danais Plexippus); - called also milkweed butterfly.
(5):
(a.) Superior to others; preeminent; supreme; ruling.