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 defies explanation. …

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

Mar 20, 2026 · 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:

Mystery is a fiction genre where the nature of an event, often a murder or other crime, remains mysterious until the end of the story. Often within a closed circle of suspects, each suspect is usually …

3 days ago · Noun mystery (countable and uncountable, plural mysteries) Something secret or unexplainable; an unknown.