This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Sunny, full of sunshine.

adj. Bright, as though with sunshine; shining.

adj. Cheerful, happy.

adj. Bright with the rays of the sun; clear, warm, or pleasant.

adj. Bright like the sun; resplendent.

adj. Beaming with good spirits; cheerful.

Bright with the rays of the sun; having the sky unclouded in the daytime: as, sunshiny weather.

Bright like the sun.

Bright; cheerful; cheery.

"She said it looked kind of sunshiny, even on a dark day."

resplendent    cheerful    sunny   

balmy    sunny    cloudless    equable    windless