cheerful or carefree in mood or disposition
Collins Concise English Dictionary © HarperCollins Publishers::
'light-hearted' also found in these entries (note: many are not synonyms or translations):
blithe
- breezy
- caper
- chaff
- debonair
- free-hearted
- frolic
- gay
- insouciant
- jeu d'esprit
- jovial
- operetta
- raillery
- scherzando
- sunshine