adj. Understood by only a few; obscure; requiring secret or mysterious knowledge.
the GNU version of the Collaborative International Dictionary of English
adj. Hidden; secret.
The Century Dictionary and Cyclopedia
Hidden; secret.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. requiring secret or mysterious knowledge
Word Usage
"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"