monarchy Look up monarchy at Dictionary.com
"rule by one person," c.1390, from O.Fr. monarchie, from L.L. monarchia, from Gk. monarkhia "absolute rule," lit. "ruling of one," from monos "alone" (see mono-) + arkhein "to rule" (see archon). Meaning "a state ruled by monarchical government" is from c.1430; monarch is from c.1450; monarchist first attested 1647.