Meaning of the word "cold case" in English

What does "cold case" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

cold case

US /ˈkoʊld keɪs/
UK /ˈkoʊld keɪs/
"cold case" picture

Noun

1.

an unsolved criminal investigation that has been closed but could be reopened if new evidence emerges

Example:
Detectives reopened the cold case after a new witness came forward.
The documentary explored several famous cold cases.
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