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Definition of "adamantine" []

  • Made of or resembling adamant. (adjective)
  • Having the hardness or luster of a diamond. (adjective)
  • Unyielding; inflexible: "If there is one dominant trait that emerges from this account, it is adamantine willpower” ( Eugene Linden). (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Use "adamantine" in a sentence
  • "Maybe it's the word adamantine's magnetic lure and"
  • "AVING contributed to bring into notice the mineral fubftance from the EafUIndiesi which is generally called adamantine fpar, I beg leave to lay before the Royal Society tho following account of its hiftory and introdu£kion."
  • "The word 'adamantine' is connected with the Greek adamas, meaning 'unconquerable.'"