Webster's Revised Unabridged Dictionary · 1913

Monarch

Monarch , noun

[French monarque, Latin monarcha, from Greek {not transcribed}, {not transcribed}; mo`nos alone + {not transcribed} to be first, rule, govern. See Archi-.]

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
2.
One superior to all others of the same kind; as, an oak is called the monarch of the forest.
3.
A patron deity or presiding genius.
Come, thou, monarch of the vine, Plumpy Bacchus. — Shakespeare
4.
(Zoology) A very large red and black butterfly (Danais Plexippus); -- called also milkweed butterfly and monarch butterfly.

Monarch , adjective

Superior to others; preeminent; supreme; ruling.
Monarch savage. — Pope