a monarch who rules or reigns over an empire
WordReference Random House Learner's Dictionary of American English © 2026
em•per•or /ˈɛmpərɚ/USA pronunciation
n. [countable]
WordReference Random House Unabridged Dictionary of American English © 2026- World Historythe male supreme ruler of an empire.
em•per•or
(em′pər ər),USA pronunciation n.
em′per•or•ship′, n.
- World Historythe male sovereign or supreme ruler of an empire:the emperors of Rome.
- Printing[Chiefly Brit.]a size of drawing or writing paper, 48 × 72 in. (122 × 183 cm).
- Latin imperātor origin, originally, one who gives orders, ruler, equivalent. to imperā(re) to order, command (im- im-1 + -perāre, combining form of parāre to provide, prepare) + -tor -tor
- Anglo-French; Old French empereor
- Middle English empero(u)r 1175–1225
Collins Concise English Dictionary © HarperCollins Publishers::
'emperor' also found in these entries (note: many are not synonyms or translations):
Aduwa
- Agrippina
- Agrippina II
- Akbar
- Akihito
- Alaric
- Albert II
- Alexander Severus
- Alexius I
- An Lu Shan
- Anastasius I
- Antonine Wall
- Antoninus Pius
- Arnulf
- Atahualpa
- August
- Augustan
- Augustus
- Aurangzeb
- Aurelian
- Bao Dai
- Barbarossa
- Basil I
- Bertolucci
- Bokassa I
- Byzantine Empire
- Caesar
- Caligula
- Canossa
- Caracalla
- Ch'ien Lung
- Chao K'uang-yin
- Charlemagne
- Charles I
- Charles II
- Charles III
- Charles IV
- Charles V
- Charles VI
- Charles VII
- Claudius
- Claudius I
- Claudius II
- Commodus
- Conrad II
- Conrad III
- Conrad IV
- Constans I
- Constantine I
- Constantine II