mysterium, from Greek, from mystos 'keeping silent', from myein (of the eyes or lips) 'to be closed'
mys‧te‧ry1W3 plural mysteries
1 [countable usually singular]an event, situation etc that people do not understand or cannot explain because they do not know enough about itCOLLOCATIONS COLLOCATIONS remain a mystery be a mystery (to somebody) it's a mystery solve/unravel a mystery (=find an explanation for it) the mystery deepens (=it becomes more difficult to understand) a complete mystery an unsolved mystery be one of life's (little) mysteries (=be something that you will never understand - used humorously)
his introduction to the mysteries of the perfume business
4 [countable]alsomurder mysterya story, film, or play about a murder, in which you are not told who the murderer is until the end:
an Agatha Christie mystery
WORD FOCUS: book WORD FOCUS: book a book about imaginary events:novel, thriller, mystery, horror story, love story, detective story, whodunit books about imaginary events in general:fiction, science fiction, romantic fiction, crime fiction, chick litinformal famous or important novels, poems etc :literature books about real events:non-fiction a book that gives information:reference book, encyclopedia, textbook a book about someone's life:biography, autobiography, journal, diary someone who writes books:writer, author, novelist a book with a hard cover:hardback /hardcoverAmerican English a book with a cover made of paper or card:paperback ➔ See alsobook
Definition from the Longman Dictionary of Contemporary English Advanced Learner's Dictionary.