'Unlikelihood' definitions:

Definition of 'unlikelihood'

From: WordNet
noun
The improbability of a specified outcome [syn: unlikelihood, unlikeliness] [ant: likelihood, likeliness]

Definition of 'Unlikelihood'

From: GCIDE
  • Unlikelihood \Un*like"li*hood\, n. Absence of likelihood. [1913 Webster]

Synonyms of 'unlikelihood'

From: Moby Thesaurus