diadem

American  

[dahy-uh-dem] / ˈdaɪ əˌdɛm /

noun

1. a crown.

2. a cloth headband, sometimes adorned with jewels, formerly worn by monarchs in Asia Minor and other parts of the East.

3. royal dignity or authority.

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verb (used with object)

1. to adorn with or as if with a diadem; crown.

diadem British  

/ ˈdaɪəˌdɛm /

noun

1. a royal crown, esp a light jewelled circlet

2. royal dignity or power

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verb

1. (tr) to adorn or crown with or as with a diadem

Etymology

Origin of diadem

1250–1300; Middle English diademe (< Anglo-French ) < Latin diadēma < Greek diádēma fillet, band, equivalent to diadē- (verbid stem of diadeîn to bind round + -ma noun suffix

Example Sentences

Also stolen was a diadem that once belonged to the Empress Eugenie, which has nearly 2,000 diamonds; and a necklace that once belonged to Marie-Amelie, the last queen of France.

From Barron's

According to the authorities, eight items were taken including diadems, necklaces, ear-rings and brooches.

From BBC

The greenstone ornaments are typical of the Late Classic period and the mask and diadem are known to be exclusive to Maya royalty.

From Science Magazine

“This is exactly how I felt when we unearthed a sultana’s hidden diadem too...”

From Literature

If you're looking at it and wondering why it seems familiar, it might be because that diadem was seen on stamps from the late Queen's reign.

From BBC