# diadem

> English word · Noun · IPA /ˈdaɪ.əˌdɛm/ · frequency rank #60,014

## Definitions
1. An ornamental headband worn as a badge of royalty.
2. A crown.
3. Regal power; sovereignty; empire—considered as symbolized by the crown.
4. An arch rising from the rim of a crown (rarely also of a coronet), and uniting with others over its centre.

## Etymology
From Middle English diademe, dyademe, from Old French diademe, from Latin diadēma, from Ancient Greek διάδημα (diádēma, “band, especially worn around a tiara”), from διαδέω (diadéō, “bind around”).

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/diadem