Definition of "arcane" []

• Known or understood by only a few: arcane economic theories. See Synonyms at mysterious. (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.

• "To be attributed the concept arcane, on this view, it suffices that S uses the expression ˜arcane™ by and large correctly, ˜in keeping with its content™ “ if she is committed to her community practice of using the corresponding expression"
• "A Stygian this time, his face tattooed in arcane designs that had been old when Acheron was new to the world."
• "They were covered in arcane tattoos, but none of them were of Set, the serpent god that Conan, like most westerners abhorred."