Main Entry: mon·arch

Pronunciation: \ˈmä-nərk, -ˌnärk\

Function: noun

Etymology: Late Latin monarcha, from Greek monarchos, from mon- + -archos -arch

Date: 15th century

1 : a person who reigns over a kingdom or empire: as a : a sovereign ruler b : a constitutional king or queen
2 : one that holds preeminent position or power
3 : monarch butterfly

— mo·nar·chal \mə-ˈnär-kəl, mä-\ or mo·nar·chi·al \-kē-əl\ adjective