Definition of Prester John in English:

Prester John

proper noun

  • A legendary medieval Christian king of Asia (and, later, of Ethiopia), said to have defeated the Muslims and to be destined to bring help to the Holy Land.

Origin

Middle English: from Old French prestre Jehan, from medieval Latin presbyter Johannes priest John.

Pronunciation:

Prester John

/ˌprestər ˈjän/