Definitions for "Blithe"
Gay; merry; sprightly; joyous; glad; cheerful; as, a blithe spirit.
mild, gentle, kind, merciful; the external manifestation of one's own pleased or happy frame of mind, and hence even to the state itself
carefree and happy and lighthearted; "was loved for her blithe spirit"; "a merry blithesome nature"; "her lighthearted nature"; "trilling songs with a lightsome heart"
Blithe is a fictional character from DC Comics' Supergirl series. She first appeared in Supergirl # 39, December 1999.
lacking or showing a lack of due concern; "spoke with blithe ignorance of the true situation"