CHEERFUL
cheerful
(adjective) 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”
cheerful, pollyannaish, upbeat
(adjective) pleasantly (even unrealistically) optimistic
Source: WordNet® 3.1
Etymology
Adjective
cheerful (comparative more cheerful, superlative most cheerful)
Noticeably happy and optimistic.
Synonyms: bright, bubbly, cheerly, ebullient, happy, joyful, merry, optimistic, vivacious, Thesaurus:happy
Antonyms: depressed, miserable, sad
Bright and pleasant.
Source: Wiktionary
Cheer"ful, a.
Definition: Having or showing good spirits or joy; cheering; cheery;
contented; happy; joyful; lively; animated; willing.
To entertain a cheerful disposition. Shak.
The cheerful birds of sundry kind Do chant sweet music. Spenser.
A cheerful confidence in the mercy of God. Macaulay.
This general applause and cheerful shout. Shak.
Syn.
– Lively; animated; gay; joyful; lightsome; gleeful; blithe; airy;
sprightly; jocund; jolly; joyous; vivacious; buoyant; sunny; happy;
hopeful.
Source: Webster’s Unabridged Dictionary 1913 Edition