'Merriness' definitions:

Definition of 'merriness'

From: WordNet
noun
The trait of merry joking [syn: jocoseness, jocosity, merriness, humorousness]

Definition of 'Merriness'

From: GCIDE
  • Merriness \Mer"ri*ness\, n. The quality or state of being merry; merriment; mirth; gayety, with laughter. [1913 Webster]