Diadem

Diadem - (Easton's Bible Dictionary)

The tiara of a king (Ezek. 21:26; Isa. 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 (Rev. 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 [159]CROWN.)

Diadem - (Webster's 1828 Dictionary)

DIADEM, n. [Gr., to gird; to bind. L.]

1. Anciently, a head-band or fillet worn by kings as a badge or royalty. It was made of silk, linen or wool, and tied round the temples and forehead, the ends being tied behind and let fall on the neck. It was usually white and plain; sometimes embroidered with gold, or set with pearls and precious stones.

2. In modern usage, the mark or badge of royalty, worn on the head; a crown; and figuratively, empire; supreme power.

3. A distinguished or principal ornament.

A diadem of beauty. Isa 28.