'lighthearted' definitions:

Definition of 'lighthearted'

From: WordNet
adjective
Carefree and happy and lighthearted; "was loved for her blithe spirit"; "a merry blithesome nature"; "her lighthearted nature"; "trilling songs with a lightsome heart" [syn: blithe, blithesome, lighthearted, lightsome, light-hearted]