noun
the cheerful feeling you have when nothing is troubling you
• Syn: ↑carefreeness, ↑insouciance, ↑lightsomeness
• Derivationally related forms: ↑lightsome (for: ↑lightsomeness), ↑lighthearted, ↑insouciant (for: ↑insouciance), ↑carefree (for: ↑carefreeness)
• Hypernyms: ↑cheerfulness, ↑blitheness
Useful english dictionary. 2012.