Definition & Meaning of "whodunit"

What is a "whodunit"?

A whodunit is a type of mystery story, whether in a book, film, or play, that revolves around solving a crime or uncovering the identity of the perpetrator. The term is derived from "who done it," and the plot typically centers on investigating a murder or other crime, with the audience trying to piece together clues to determine who the culprit is. Whodunits often feature a detective or investigator who works to solve the mystery and reveal the criminal before the story ends.