whodunit

noun

who·​dun·​it hü-ˈdə-nət How to pronounce whodunit (audio)
variants or less commonly whodunnit
: a detective story or mystery story

Did you know?

In 1930, Donald Gordon, a book reviewer for News of Books, needed to come up with something to say about a rather unremarkable mystery novel called Half-Mast Murder. "A satisfactory whodunit," he wrote. The relatively new term (introduced only a year earlier) played fast and loose with spelling and grammar, but whodunit caught on anyway. Other writers tried respelling it who-done-it, and one even insisted on using whodidit, but those sanitized versions lacked the punch of the original and fell by the wayside. Whodunit became so popular that by 1939 at least one language pundit had declared it "already heavily overworked" and predicted it would "soon be dumped into the taboo bin." History has proven that prophecy false, and whodunit is still going strong.

Examples of whodunit in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
That’s when this upstairs-downstairs comedy becomes a whodunit. Anthony D'alessandro, Deadline, 31 Oct. 2025 Its quality isn't the horror itself but the ghoulish environment and subtle danger that lies beneath, being a whodunit occult film that never lets up, keeping us guessing on the true nature of the terrors up until the bitter end. Michael Lee Simpson, Entertainment Weekly, 29 Oct. 2025 While Gomez has played Mabel Mora on Hulu's whodunit since its premiere in 2021, Park played up-and-coming actress Kimber Min as a recurring character for just one season in 2023. Ashlyn Robinette, PEOPLE, 27 Oct. 2025 The character work elevates this far above your usual slasher or whodunit, and has a lot to say about the threat of solitude always darkening the edges of old age. Neil McRobert, Vulture, 16 Oct. 2025 See All Example Sentences for whodunit

Word History

Etymology

alteration of who done it?

First Known Use

1929, in the meaning defined above

Time Traveler
The first known use of whodunit was in 1929

Browse Nearby Words

Podcast

Cite this Entry

“Whodunit.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/whodunit. Accessed 4 Nov. 2025.

Kids Definition

whodunit

noun
who·​dun·​it hü-ˈdən-ət How to pronounce whodunit (audio)
: a detective or mystery story presented as a novel, play, or motion picture

More from Merriam-Webster on whodunit

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!