Definition of "adamantean" [ad•a•man•te•an]

• Of adamant; hard as adamant. (adjective)

Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License

• "In the everyday kingdom of mere things, in contact with our joyless existence and the adamantean wall of social customs and falsehoods, he saw nothing but confusion, madness, death."
• "Fulke's unwavering smile; the Sieur d'Arnaye was adamantean: and presently the younger man kissed him on both cheeks and rode slowly away toward the sea."
• "We forget the age of life, the barriers so thin yet so adamantean of space and circumstance; and I have had the rarest poems self-singing in my head of brave men that work and conspire in a perfect intelligence across seas and conditions -- and meet at last."