- the supreme ruler of an empire
- any of various butterflies (family Nymphalidae) and moths (family Saturniidae)
Origin: ME emperour < OFr empereor, ruler (of the Holy Roman Empire) < L imperator, commander in chief < pp. of imperare, to command < in-, in + parare, to set in order, prepare
- emperorship noun
Used by arrangement with John Wiley & Sons, Inc.
- The male ruler of an empire.
- a. The emperor butterfly.b. The emperor moth.
Origin: Middle English emperour, from Old French empereor, from Latin imperātor, from imperāre, to command : in-, in; see en-1 + parāre, to prepare; see perə-1 in Indo-European roots.
- emˈper·or·shipˌ noun