Smith's Bible Dictionary (1863)
Properly “the Cushite,” “the Ethiopian,” a man apparently attached to Joab’s person.
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
CU'SHI (the Ethiopian). 1. One to whom Joab intrusted the news of the defeat and death of Absalom. 2 Sam 18:21-23, 2 Sam 18:31-32. An ancestor of Jehudi. Jer 36:14. The father of Zephaniah the prophet. Zeph 1:1.