a male ruler who has absolute power over an empire, usually ranking above a king
The emperor addressed the crowd from his balcony, promising peace and prosperity.
Historians study how the Roman emperor Augustus transformed the ancient world.
✦ from Latin imperator “commander, emperor,” originally a title for victorious generals, from imperare “to command”
a large brightly coloured angelfish or butterflyfish found in tropical oceans
The diver spotted an emperor gliding gracefully over the coral reef.
Marine biologists tagged several juvenile emperors to study their migration patterns.
✦ named for its regal, vividly banded appearance suggesting royal robes
