'Mirthfulness' definitions:

Definition of 'mirthfulness'

From: WordNet
noun
Great merriment [syn: hilarity, mirth, mirthfulness, glee, gleefulness]

Definition of 'Mirthfulness'

From: GCIDE
  • Mirthful \Mirth"ful\, a.
  • 1. Full of mirth or merriment; merry; as, mirthful children. [1913 Webster]
  • 2. Indicating or inspiring mirth; as, a mirthful face. [1913 Webster]
  • Mirthful, comic shows. --Shak. [1913 Webster] -- {Mirth"ful*ly}, adv. -- {Mirth"ful*ness}, n. [1913 Webster]