from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Of, relating to, or being a mystery: mysterious and infinite truths.
- adj. Simultaneously arousing wonder and inquisitiveness, and eluding explanation or comprehension: a mysterious visitor; mysterious conduct.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Of unknown origin
- adj. Having unknown qualities
from the GNU version of the Collaborative International Dictionary of English
- adj. Of or pertaining to mystery; containing a mystery; difficult or impossible to understand; inexplicable; obscure; not revealed or explained; enigmatical; incomprehensible.
from The Century Dictionary and Cyclopedia
- Partaking of or containing mystery; obscure; not revealed or explained; unintelligible.
- Expressing, intimating, or implying a mystery: as, a mysterious look; his manner was very mysterious and important.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. having an import not apparent to the senses nor obvious to the intelligence; beyond ordinary understanding
- adj. of an obscure nature
French mystérieux, from mystère, secret, from Latin mystērium; see mystery1.(American Heritage® Dictionary of the English Language, Fourth Edition)