Diadem [S]

the tiara of a king ( Ezekiel 21:26 ; Isaiah 28:5 ; 62:3 ); the turban ( Job 29:14 ). In the New Testament a careful distinction is drawn between the diadem as a badge of royalty ( Revelation 12:3 ; 13:1 ; 19:12 ) and the crown as a mark of distinction in private life. It is not known what the ancient Jewish "diadem" was. It was the mark of Oriental sovereigns. (See CROWN .)

These dictionary topics are from
M.G. Easton M.A., D.D., Illustrated Bible Dictionary, Third Edition,
published by Thomas Nelson, 1897. Public Domain, copy freely.

[S] indicates this entry was also found in Smith's Bible Dictionary

Bibliography Information

Easton, Matthew George. "Entry for Diadem". "Easton's Bible Dictionary". .