Wiktionary
a. (archaic form of cheerful English)
Usage examples of "cheerfull".
While Austin was giving his cheerfuller views of the case, Lucy came in preceding the baby.
He saw that she was cheerfuller than she had been, and helpfuller with him and her mother.
I have been at to dispel those gloomy ideas and give him cheerfuller views!
The cheerfullest thing I could think of to say was: `But he didn't leave you.
Hepzibah's small and ancient table, supported on its slender and graceful legs, and covered with a cloth of the richest damask, looked worthy to be the scene and center of one of the cheerfullest of parties.
Again I thanked him and apologized, and again he said in the cheerfullest manner, “Not at all, I am sure!
He had evidently lived in varied cities and very motley societies, for some of his cheerfullest stories were about gambling hells and opium dens, Australian bushrangers or Italian brigands.