Di'a-dem, n.

n. [Gr. διάδημα, from διαδεῖν, to bind round, from διά, through, across, and δεῖν, to bind; Lat. & Fr. diadema, Fr. diadème.]

1Sense 1. An ornamental head-band or fillet, worn as a badge of royalty; hence, also, a crown.

2Sense 2. Royalty; sovereignty; dignity; — considered as symbolized by the crown.

3Sense 3. (Her.) An arch rising from the rim of a crown, rarely also of a coronet, and uniting with others over its center.