something that baffles understanding and cannot be explained
How it got out is a mystery. It remains one of nature's secrets.
source: WordNet 3.0
a story about a crime (usually murder) presented as a novel or play or movie
source: WordNet 3.0
A profound secret; something wholly unknown, or something kept cautiously concealed, and therefore exciting curiosity or wonder; something which has not been or can not be explained; hence, specifically, that which is beyond human comprehension.
source: Webster 1913
A trade; a handicraft; hence, any business with which one is usually occupied.
