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

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

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:

If you talk about the mystery of someone or something, you are talking about how difficult they are to understand or know about, especially when this gives them a rather strange or magical quality.

MYSTERY meaning: 1 : something that is not known something that is difficult to understand or explain; 2 : the quality of being difficult to understand or explain the quality of being mysterious

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

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

Dec 11, 2025 · The Best Mystery Novels of 2025 Our columnist on the books that wowed her this year. Credit...Photo illustration by Sebastian Mast Share full article