noun
plural -teries
[count] :something that is not known
[noncount] :the quality of being difficult to understand or explain :the quality of being mysterious
[count] :a religious event or idea that cannot be fully understood or explained
[count] :a book, play, or movie that describes a crime and the process of solving it
[count] :someone or something whose identity has been kept secret especially in order to create interest or excitement - usually used before another noun