(mysteries)
Frequency: The word is one of the 3000 most common words in English.
1.
A mystery is something that is not understood or known about.
The source of the gunshots still remains a mystery.
...the mysteries of mental breakdown.
N-COUNT
2.
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.
She's a lady of mystery...
It is an elaborate ceremony, shrouded in mystery.
N-UNCOUNT
3.
A mystery person or thing is one whose identity or nature is not known.
The mystery hero immediately alerted police after spotting a bomb.
...a mystery prize of up to ?1,000.
ADJ: ADJ n
4.
A mystery is a story in which strange things happen that are not explained until the end.
His fourth novel is a murder mystery set in London.
N-COUNT