• WordNet 3.6
    • n diadem an ornamental jeweled headdress signifying sovereignty
    • ***
Webster's Revised Unabridged Dictionary
    • Diadem (Her) An arch rising from the rim of a crown (rarely also of a coronet), and uniting with others over its center.
    • Diadem Originally, an ornamental head band or fillet, worn by Eastern monarchs as a badge of royalty; hence (later), also, a crown, in general. "The regal diadem ."
    • Diadem Regal power; sovereignty; empire; -- considered as symbolized by the crown.
    • v. t Diadem To adorn with a diadem; to crown. "Not so, when diadem'd with rays divine.""To terminate the evil,
      To diadem the right."
    • ***
Century Dictionary and Cyclopedia
    • n diadem Anciently, a head-band or fillet worn by kings as a badge of royalty. It was made of silk, linen, or wool, and encircled the temples and forehead, the ends being tied behind, so as to fall on the neck. It was originally white and plain, but was later embroidered with gold or set with pearls or precious stones, and little by little increased in richness until it was developed into the modern crown.
    • n diadem Anything worn on the head as a mark or badge of royalty; a crown.
    • n diadem Figuratively, supreme power; sovereignty.
    • n diadem In heraldry, one of the arches which rise from the rim or circle of a crown, and support the mound or globe at the top.
    • n diadem In zoology, a certain monkey, Cercopithecus diadematus.
    • diadem To adorn with or as if with a diadem; crown.
    • n diadem In embryology, a term applied to certain eggs in the blastula stage.
    • ***
Chambers's Twentieth Century Dictionary
    • n Diadem dī′a-dem a band or fillet worn round the head as a badge of royalty: a crown: royalty
    • ***


  • Emily Dickinson
    “Nature, like us is sometimes caught without her diadem.”


Webster's Revised Unabridged Dictionary
F. diadème, L. diadema, fr. Gr. , fr. to bind round; dia` through, across + to bind; cf. Skr. , to bind
Chambers's Twentieth Century Dictionary
O. Fr. diademe—L. diadema—Gr. diadēmadia, round, and deein, to bind.


In literature:

Old Ocean, with a diadem of verdure Crowning the summit where his reach was stayed!
"The Woman Who Dared" by Epes Sargent
His feet were shod with golden sandals, and upon his head he wore the Mexican diadem.
"The True Story Book"
Her face was slightly flushed, and the colour intensified the pale gold diadem of her blonde hair.
"Robert Orange" by John Oliver Hobbes
That great event of the day, the crown and diadem to its royalty, and which became it so well, was ready promptly to the hour.
"Holiday Tales" by W. H. H. Murray
A diadem of the same shape crowned her dark hair.
"A Modern Mercenary" by Kate Prichard and Hesketh Vernon Hesketh-Prichard
The diadem was light indeed, compared with the tiara.
"Pilgrimage from the Alps to the Tiber" by James Aitken Wylie
Thus, nature, which gave the peacock a diadem on its head, and a throne in its tail, has given it a pair of frightful legs.
"Blackwood's Edinburgh Magazine, Volume 56, Number 349, November, 1844" by Various
Apollo, the mighty master of the diadem; to whom nothing is comparable.
"The Roman History of Ammianus Marcellinus" by Ammianus Marcellinus
Soft hair on which light drops a diadem.
"Wee Wifie" by Rosa Nouchette Carey
They tell to us no story of the past; and poetry has not crowned them with a diadem of romance.
"Brighter Britain! (Volume 1 of 2)" by William Delisle Hay
His diadem was of plumes very brilliantly colored.
"Ferdinand De Soto, The Discoverer of the Mississippi" by John S. C. Abbott
Thou shalt be pearl unto a diadem Which the Heavens jewel.
"The International Monthly, Volume 3, No. 2, May, 1851" by Various
Perhaps if the diademed tyrants had treated it with indifference, the effects would have been otherwise.
"An Old Sailor's Yarns" by Nathaniel Ames
The mockery of his diadem only remained.
"Great Men and Famous Women, Vol. 8 (of 8)" by Various
Unlike all the others it wore no diadem of snow.
"The Heart of Thunder Mountain" by Edfrid A. Bingham
A fair forehead outshines its diamond diadem.
"Modern Painters Volume II (of V)" by John Ruskin
"The Pirate Woman" by Aylward Edward Dingle
The saints open a shining path, down which a flower-crowned Love flutters with the diadem and palm of victory.
"The Venetian School of Painting" by Evelyn March Phillipps
Both wore diadems of emeralds.
"The Goddess of Atvatabar" by William R. Bradshaw
Shall I hae a gem at Tollishill that I wadna exchange for a monarch's diadem?
"Wilson's Tales of the Borders and of Scotland, Volume I" by Various

In poetry:

He holds the tangled threads,
His hands unravel them;
He knows the hearts and heads
For thorns, or diadem.
""To-Morrows"" by Abram Joseph Ryan
Tall were its leaves and slender,
Slender and tall its stem;
Purity, all its splendour,
Beauty, its diadem.
"A Snow-White Lily" by Alfred Austin
Every liquid, falling gem,
Flashing like the diamond's ray,
In an eastern diadem,
Let me kiss them all away.
"To Bettie" by James Avis Bartley
A star in some bright diadem
In glory it shall be,
For truly, "I will honor them,"
Saith God, "who honor me."
"Watch Hill" by Hattie Howard
For still, outside the nursery door,
The bright persistency,
A molten diadem on the floor,
Lay burning wondrously.
"The Prism" by George MacDonald
"I knew them. Each had on his brow
The martyr's diadem—
Ay, Paterson, thou well mayest look,
For thou wert one of them.
"Cameron's Stone" by Alexander Anderson

In news:

Raleigh rapper King Mez is a prefect of hip-hop morals—a bright, value-driven hip-hop enthusiast whose lyrics and Jordans have just as much if not more value than his self-made diadem.
'Diadem' by Timothy Horn, 2008, crystallized rock sugar, plywood, steel.
On the far side of the cloister in the long, chapel-like room called the Treasure, she sits on her throne—a small stiff gold figure robed in gold and covered with jewels and crowned with a golden diadem.