What does "basileus" mean?

A title of the Byzantine emperor.

What is a synonym for "basileus"?

Common synonyms include: autocrat, emperor, king, monarch, ruler, sovereign.

Pronounced //ˌbæsɪˈleɪəs//.

/ˌbæsɪˈleɪəs/ noun

noun ·Rare ·Advanced level

Noun

1
A title of the Byzantine emperor.
"For two centuries its towers and domes were to rise in the heavens, drawing the attention of Emperors and Basilei, of Popes and Patriarchs."
2
a ruler of the eastern Roman Empire wordnet

"For two centuries its towers and domes were to rise in the heavens, drawing the attention of Emperors and Basilei, of Popes and Patriarchs."

Borrowed from Ancient Greek βασιλεύς (basileús, “chief, king”).