cheerfulness
1. [ noun ] the quality of being cheerful and dispelling gloom
Synonyms: cheer
Examples:

"flowers added a note of cheerfulness to the drab room"

Related terms: uncheerfulness attribute good-temperedness disposition cheerful cheerless
2. [ noun ] a feeling of spontaneous good spirits
Synonyms: blitheness
Examples:

"his cheerfulness made everyone feel better"

Related terms: cheerlessness happiness carefreeness buoyancy
Similar spelling:   cheerfully