• WordNet 3.6
    • adj adamantine impervious to pleas, persuasion, requests, reason; she would have none of him"- W.Churchill "he is adamant in his refusal to change his mind","Cynthia was inexorable","an intransigent conservative opposed to every liberal tendency"
    • adj adamantine having the hardness of a diamond
    • adj adamantine consisting of or having the hardness of adamant
    • ***
Webster's Revised Unabridged Dictionary
    • Adamantine (Min) Like the diamond in hardness or luster.
    • Adamantine Made of adamant, or having the qualities of adamant; incapable of being broken, dissolved, or penetrated; as, adamantine bonds or chains.
    • ***
Century Dictionary and Cyclopedia
    • adamantine Made of adamant; having the qualities of adamant; impenetrable.
    • adamantine Resembling the diamond in hardness or in luster.
    • adamantine Corundum, from its hardness or peculiar occasional luster. See corundum.
    • ***
Chambers's Twentieth Century Dictionary
    • Adamantine made of or like adamant: that cannot be broken or penetrated
    • ***


Webster's Revised Unabridged Dictionary
L. adamantinus, Gr.
Chambers's Twentieth Century Dictionary
L. and Gr. adamas, -antosa, neg., and damaein, to break, to tame. See Tame.


In literature:

Its strength we feel, its adamantine fidelity to the House of Ulysses.
"Homer's Odyssey" by Denton J. Snider
Utter silence and utter lifelessness engulf the Globe; the frozen and adamantine bars of oblivion fall.
"The Masque of the Elements" by Herman Scheffauer
And what a triumph for a thief to capture an adamantine heart!
"Penny of Top Hill Trail" by Belle Kanaris Maniates
She knew well that strata of hardness in his nature, the adamantine will that wrought torture to its possessor because it could not bend.
"The Wall Between" by Sara Ware Bassett
Zircon comes nearest to having adamantine luster of any of the other gems.
"A Text-Book of Precious Stones for Jewelers and the Gem-Loving Public" by Frank Bertram Wade
They discovered that they were merely butting their heads against an adamantine rock.
"India, Its Life and Thought" by John P. Jones
In each scene with him, after each plea, or through it, she came to this adamantine wall.
"The "Genius"" by Theodore Dreiser
Then, one night, as he was watching his lines and hooks, something happened which broke the adamantine seal upon his soul.
"Prisoners of Conscience" by Amelia Edith Huddleston Barr
One more faggot of these adamantine bandages, is, the new science of Statistics.
"The Voice of Science in Nineteenth-Century Literature" by Various
If this adamantine chain were to hold no longer, what tie in the world could be relied on?
"Specimens of German Romance" by Carl Franz van der Velde

In poetry:

Then with her genial breath create
New life within the teeming land;
And rescue nature, bound so late
By winter's adamantine hand.
"Thaw" by Charlotte Dacre
Ah! what fetters adamantine
Bind and hold him in their thrall!
Oft the scorpion scourge of horror
On his shrinking soul will fall.
"Comparative Slavery" by Janet Hamilton
S. But Lord! what if I turn again,
And with an adamantine chain,
Lock me to thee? What if I chase
The world away to give thee place?
"A Dialogue Betwixt God And The Soul" by Sir Henry Wotton
Thy countenance, so sternly set,
Did seem to say how vain to knock
At thy heart's door, for all within
Was hard, as adamantine rock.
"Happiness" by Thomas Frederick Young
But silent is the brazen sky;
On sweeps the meteor's threatening train,
Unswerving Nature's mute reply,
Bound in her adamantine chain.
"On The Death Of President Garfield" by Oliver Wendell Holmes
I am that hawk of gold
Proud in adamantine poise
On the pillars of turquoise,
See,beyond the starry fold,
Where a darkling orb is rolled.
"The Hawk and the Babe" by Aleister Crowley