The Collaborative International Dictionary of English v.0.48:

Merrymaking \Mer"ry*mak`ing\, a.
   Making or producing mirth; convivial; jolly.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Merrymaking \Mer"ry*mak`ing\, n.
   The act of making merry; conviviality; merriment; jollity.
   --Wordsworth.
   [1913 Webster]

WordNet (r) 3.0 (2006):

merrymaking
    n 1: a boisterous celebration; a merry festivity [syn:
         merrymaking, conviviality, jollification]