Easton's Bible Dictionary: M. G. Easton, M.A., D.D.
Necromancer
(Dt. 15:11), i.e., "one who interrogates the dead," as the word literally means, with the view of discovering the secrets of futurity (comp. 1 Sam. 28:7).Original from The Bible Foundation - bf.org. They claim public domain status for their original text.