whodunit
Americannoun
Other Word Forms
Noun Inflected Forms
Etymology
Origin of whodunit
1925–30; jocular formation from question Who done it?, for standard English Who did it?
Explanation
A whodunit is a mystery story that keeps the criminal's identity a secret until the very end. A well-written whodunit can keep you up late turning pages, eager for the ending to be revealed. If a book, play, or movie is a whodunit, there's usually a detective investigating what's almost always a murder case. The key to the plot, which is generally complex and confusing, is the question implicit in the informal whodunit: "Who (has) done it?" Since it was coined around 1930 in the U.S., this term has been common for a particular type of mystery or detective story.
Vocabulary lists containing whodunit
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
See Examples For:
"We can't just watch the crime happen, so we have to work with all the clues we're given to figure out whodunit."
From Science Daily ● Jul. 16, 2026
It never occurs to George that his sheep are as invested in finding out whodunit as he is.
From Salon ● May 17, 2026
“Memory of a Killer” may turn out to be a whodunit in which the guy who’s done it doesn’t know he did it.
From The Wall Street Journal ● Jan. 22, 2026
Another set of noteworthy entries from 2025 engage with classic whodunit scenarios.
From The Wall Street Journal ● Dec. 12, 2025
Aguirre-Sacasa has said that his drama first presents as a whodunit and evolves into a “whydunit.”
From "Drama High" by Michael Sokolove
These details make her either an obvious suspect or obviously not guilty according to your experience with whodunits.
From The Wall Street Journal ● May 7, 2026
"Endeavour" meets the "Mystery!" stable's case-of-the-week qualification but the complexity of the whodunits is nothing compared to the intricacy of its character studies.
From Salon ● Jun. 18, 2023
Shogan has written a series of Washington-based whodunits, with titles like “Homicide in the House” and “Stabbing in the Senate.”
From Seattle Times ● Sep. 20, 2022
It’s one of the greatest whodunits of all time: What killed the dinosaurs, along with three-quarters of all other species on Earth?
From Los Angeles Times ● Jan. 16, 2022
I took note a moment ago that you mentioned the whodunits.
From We're Friends, Now by Varga, Mel
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
