Definition
[adj] being full of or promoting cheer; having or showing good spirits; "her cheerful nature"; "a cheerful greeting"; "a cheerful room"; "as cheerful as anyone confined to a hospital bed could be"
[adj] pleasantly (even unrealistically) optimistic
Synonyms
beaming, beamish, blithe, blithesome, buoyant, cheering, cheery, chipper, chirpy, debonair, debonaire, gay, glad, jaunty, lighthearted, lightsome, optimistic, perky, pollyannaish, smiling(a), sunny, twinkly, upbeat