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

1 day 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.

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

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

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

19 hours ago · 2025 was filled with exceptional mystery shows, like Peacock's All Her Fault and Netflix's The Beast in Me, but which series is the best of the year?

Mystery Science offers open-and-go lessons that inspire kids to love science. The hook, visuals, and activity have all been prepared for you. Less prep, more learning.