mystery, problem, enigma, riddle, puzzle mean something which baffles or perplexes. mystery applies to what cannot be fully understood by reason or less strictly to whatever resists or …

MYSTERY definition: anything that is kept secret or remains unexplained or unknown. See examples of mystery used in a sentence.

MYSTERY definition: 1. something strange or not known that has not yet been explained or understood: 2. a book, film…. Learn more.

3 days ago · Mystery novels are often called “whodunnits” because they turn the reader into a detective trying to figure out the who, what, when, and how of a particular crime.

Definition of mystery noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

mystery noun Anything that arouses curiosity or perplexes because it is unexplained, inexplicable, or secret:

Dec 14, 2025 · mystery (countable and uncountable, plural mysteries) The truth behind the events remains a mystery. The case was that of a murder. It had an element of mystery about it, …

any affair, thing, or person that presents features or qualities so obscure as to arouse curiosity or speculation: The masked guest is an absolute mystery to everyone.

There are six meanings listed in OED's entry for the noun mystery, three of which are labelled obsolete. See ‘Meaning & use’ for definitions, usage, and quotation evidence.

MYSTERY definition: 1. something strange or unknown that cannot be explained or understood: 2. a story, often about a…. Learn more.