- (n.) An arch rising from the rim of a crown (rarely also of a coronet), and uniting with others over its center.
- (v.t.) To adorn with a diadem; to crown.
- (n.) Regal power; sovereignty; empire; -- considered as symbolized by the crown.
- (n.) Originally, an ornamental head band or fillet, worn by Eastern monarchs as a badge of royalty; hence (later), also, a crown, in general.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). Diadem. Retrieved September 23, 2026, from http://smartdefine.org/diadem/definitions/1997149 |
| Chicago | Webster's. 2011. "Diadem" http://smartdefine.org/diadem/definitions/1997149 (accessed September 23, 2026). |
| Harvard | Webster's 2011, Diadem, Smart Define, viewed 23 September, 2026, <http://smartdefine.org/diadem/definitions/1997149>. |
| MLA | Webster's. "Diadem" 27 May 2011. Web. 23 September 2026. <http://smartdefine.org/diadem/definitions/1997149> |