Source : Webster's Revised Unabridged Dictionary (1913)

Gayly \Gay"ly\, adv.
   1. With mirth and frolic; merrily; blithely; gleefully.

   2. Finely; splendidly; showily; as, ladies gayly dressed; a
      flower gayly blooming. --Pope.

Source : WordNet®

gayly
     adv : in a joyous manner; "they shouted happily" [syn: {happily},
           {merrily}, {mirthfully}, {blithely}, {jubilantly}, {with
           happiness}] [ant: {unhappily}]