noun Informal.

a narrative dealing with a murder or a series of murders and the detection of the criminal; detective story.

Nearby words

  1. who's,
  2. who's afraid of virginia woolf?,
  3. who's who,
  4. who-does-what,
  5. whoa,
  6. whodunnit,
  7. whoe'er,
  8. whoever,
  9. whole,
  10. whole ball of wax, the

Also especially British, who·dun·nit.

Origin of whodunit

1925–30; jocular formation from question Who done it?, for standard English Who did it?

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for whodunit

Word Origin and History for whodunit



"murder mystery," 1930, U.S. slang, originally a semi-facetious formation from who done it?

Online Etymology Dictionary, © 2010 Douglas Harper