01 n. A sole or supreme ruler; a sovereign; the highest ruler; an emperor, king, queen, prince, or chief.
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1.
A sole or supreme ruler; a sovereign; the highest ruler; an emperor, king, queen, prince, or chief.“He who reigns Monarch in heaven, . . . upheld by old repute.” — Milton.
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2.
One superior to all others of the same kind; as, an oak is called the monarch of the forest.
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3.
A patron deity or presiding genius.“Come, thou, monarch of the vine, Plumpy Bacchus.” — Shak.
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4.
A very large red and black butterfly (Danais Plexippus); -- called also milkweed butterfly and monarch butterfly.(Zool.) Also: milkweed butterfly, monarch butterfly