[ hoo-duhn-it ]
/ huˈdʌn ɪt /
a narrative dealing with a murder or a series of murders and the detection of the criminal; detective story.
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
A traditional forensic investigation begins with a classic question: Whodunit?
Just what that is—and whodunit—remains the overarching plot that carries an electric current throughout the action.‘Broadchurch’: This British Murder Mystery Will Be Your Next Television Obsession|Jace Lacob|April 22, 2013|DAILY BEAST