Noun monarch has 2 senses
  1. sovereign, crowned head, monarch - a nation's ruler or head of state usually by hereditary right
    --1 is a kind of ruler, swayer; head of state, chief of state
    --1 has particulars:
     Capetian; Carolingian, Carlovingian; czar, tsar, tzar; Emperor; king, male monarch; Merovingian; Shah, Shah of Iran; Hanoverian
  2. monarch, monarch butterfly, milkweed butterfly, Danaus plexippus - large migratory American butterfly having deep orange wings with black and white markings; the larvae feed on milkweed
    --2 is a kind of danaid, danaid butterfly
    --2 is a member of Danaus, genus Danaus