Definition of Blithe

Adjective: blithe (blither,blithest) blIth or blIdh [N. Amer], blIdh [Brit]

Lacking or showing a lack of due concern
"spoke with blithe ignorance of the true situation"
Carefree and happy and lighthearted
"was loved for her blithe spirit";
- blithesome [archaic], lighthearted, lightsome, light-hearted, playful