/
ˈmɒnək/
n.
   - a sovereign head of state, especially a king, queen, or emperor.
 - a large migratory orange and black butterfly, chiefly North American, whose caterpillars feed on milkweed. 
[Danaus plexippus.]
 - 
(also monarch flycatcher)
 a flycatcher of Africa, Asia, and Australasia, typically with bold plumage. 
[Family Monarchidae: many species.]
 
Derivative
- monarchal adj.
  - monarchial adj.
  - monarchic adj.
  - monarchical adj.
  - monarchically adv.
 
Etymology
ME: from late L. monarcha, from Gk monarkhēs, from monos ‘alone’ + arkhein ‘to rule’.