a crown.
a cloth headband, sometimes adorned with jewels, formerly worn by monarchs in Asia Minor and other parts of the East.
royal dignity or authority.

verb (used with object)

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

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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Related Words for diadem

dignity, fillet, coronet, tiara, halo, headband, anadem

Examples from the Web for diadem

Contemporary Examples of diadem

Historical Examples of diadem

  • Mrs. Roberts had been at work hunting diamonds for His diadem.

  • On a throne of rocks, with a robe of clouds,   And a diadem of snow.

  • In truth it was upon that brow that he would have wished to place the diadem.

    King Candaules

    Thophile Gautier

  • I put on righteousness, and it clothed me: my judgment was as a robe and a diadem.

    Gathering Jewels

    James Knowles and Matilda Darroch Knowles

  • Americans are all equal—this is one of the gems in our diadem.

British Dictionary definitions for diadem



a royal crown, esp a light jewelled circlet
royal dignity or power


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

Word Origin for diadem

C13: from Latin diadēma, from Greek: fillet, royal headdress, from diadein to bind around, from dia- + dein to bind
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for diadem

late 13c., from Old French diademe and directly from Latin diadema "cloth band worn around the head as a sign of royalty," from Greek diadema, from diadein "to bind across," from dia- "across" (see dia-) + dein "to bind," related to desmos "band," from PIE *de- "to bind." Used of the headband worn by Persian kings and adopted by Alexander the Great and his successors.

Online Etymology Dictionary, © 2010 Douglas Harper