How to use mystery in a sentence. Synonym Discussion of Mystery. something strange or not known that has not yet been explained or understood: 2. Mar 1, 2025 · The mystery genre is a genre of fiction that follows a crime (like a murder or a disappearance) from the moment it is committed to the moment it is solved. Mystery novels are often … Define mystery. mystery synonyms, mystery pronunciation, mystery translation, English dictionary definition of mystery. One that is not fully understood or that baffles or eludes the … Definition of mystery noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. Definition, Usage, and a list of Mystery Examples. Mystery is a fiction genre where a murder or similar crime, remains mysterious until the end of the book. Apr 26, 2026 · Noun mystery (countable and uncountable, plural mysteries) Something secret or unexplainable; an unknown.