'Irresistibleness' definitions:

Definition of 'irresistibleness'

(from WordNet)
noun
The quality of being overpowering and impossible to resist [syn: irresistibility, irresistibleness]

Definition of 'Irresistibleness'

From: GCIDE
  • Irresistibleness \Ir`re*sist"i*ble*ness\, n. Quality of being irresistible. [1913 Webster]