Definition of whodunnit in English:

whodunnit

Line breaks: who|dun¦nit
Pronunciation: /huːˈdʌnɪt
 
/
(US whodunit)

noun

informal
A story or play about a murder in which the identity of the murderer is not revealed until the end.
More example sentences
  • Ten strangers with secrets are brought together in a savage rainstorm in the whodunnit thriller Identity.
  • Further compounding the peril is the fact that this is basically a murder mystery, a whodunit with slasher overtones.
  • It is a whodunnit and a thriller with thrills and fun for audience and actors alike.

Origin

1930s: from who done it?, non-standard form of who did it?.

Definition of whodunnit in:

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Pronunciation: ˌhjuːməˈrɛsk
noun
a short, lively piece of music