Synonyms for gaily

modified

1. Cheerfully

   merrily, laughingly, vivaciously; see happily 2.

2. Brightly

   showily, vivaciously, spiritedly, brilliantly, splendidly, gaudily, expensively, colorfully, extravagantly, flamboyantly, flashily, garishly, sparklingly, scintillatingly, glowingly, in a sprightly manner, with spirit, with élan, in holiday attire, with spirit and force, con brio, con spirito (both Italian).

   Antonyms quietly*, modestly, drably.