Caesar

UK: /ˈsiːzə/ US: (sē′zər)

WordReference Random House Unabridged Dictionary of American English © 2025

Cae•sar  (sē′zər), n. 

Ga•ius  (gā′əs) (or Ca•ius) (kā′əs) Julius, c100–44 b.c., Roman general, statesman, and historian.
1. Ancient History a title of the Roman emperors from Augustus to Hadrian, and later of the heirs presumptive.
2. Government any emperor.
3. Government a tyrant or dictator.
4. any temporal ruler, in contrast with God;
   the civil authority. Matt. 22:21.
5. a male given name: from a Roman family name.

Collins Concise English Dictionary © HarperCollins Publishers::

Caesar / ˈsiːzə/ noun

1. Gaius Julius ( ˈɡaɪəs ˈdʒuːlɪəs ). 100–44 bc, Roman general, statesman, and historian. He formed the first triumvirate with Pompey and Crassus (60), conquered Gaul (58–50), invaded Britain (55–54), mastered Italy (49), and defeated Pompey (46). As dictator of the Roman Empire (49–44) he destroyed the power of the corrupt Roman nobility. He also introduced the Julian calendar and planned further reforms, but fear of his sovereign power led to his assassination (44) by conspirators led by Marcus Brutus and Cassius Longinus
2. any Roman emperor
3. (sometimes not capital) any emperor, autocrat, dictator, or other powerful ruler
4. a title of the Roman emperors from Augustus to Hadrian
5. (in the Roman Empire) a title borne by the imperial heir from the reign of Hadrian
6. the heir, deputy, and subordinate ruler to either of the two emperors under Diocletian's system of government
7. short for Caesar salad