The meaning of Cushite in the Bible
(From International Standard Bible Encyclopedia)

kush'-it: Whereas kushi, is elsewhere rendered Ethiopian, in II Samuel 18:21-32 it is rendered Cushite in the Revised Version (British and American) (see CUSHI and compare CUSHITE WOMAN). Its plural, which occurs in Zephaniah, Daniel and 2 Chronicles, also in the form kushiyim, in Amos, is uniformly translated Ethiopians, following Septuagint. The other Old Testament books use simply kush, for people as well as land.

See more on the meaning of Cushite in the Bible:
Cushite {Easton's Bible Dictionary}

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