Pronunciation: (mi-stēr'ē-us), [key]
1. full of, characterized by, or involving mystery: a mysterious occurrence.
2. implying or suggesting a mystery: a mysterious smile.
3. of obscure nature, meaning, origin, etc.; puzzling; inexplicable: a mysterious inscription on the ancient tomb.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.