The meaning of Satan in the Bible
(From Easton's Bible Dictionary)

adversary; accuser. When used as a proper name, the Hebrew word so rendered has the article "the adversary" (Job 1:6-12; 2:1-7). In the New Testament it is used as interchangeable with Diabolos, or the devil, and is so used more than thirty times.

See more on the meaning of Satan in the Bible:
Satan {International Standard Bible Encyclopedia}
Satan {Hitchcock's Bible Name}

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