noun, often capitalized
ga·​on | \ ˈgäˌōn\
plural geonim\ gāˈōnə̇m , ˌgāōˈnēm \ also gaons

Definition of gaon

1 : a Jewish head of one of the Babylonian academies at Sura and Pumbedita from about a.d. 589–1038 and usually an eminent religious scholar and judicial authority used as a title of honor — compare exilarch
2 : an outstanding intellectual and Talmudic scholar the celebrated 18th century gaon of Vilna

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History and Etymology for gaon

Hebrew gā'ōn majesty, excellence (plural gĕ'ōnīm)

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an enemy or opponent

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