Definify.com

Webster 1913 Edition

Adj.

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

as, a

sunshiny

day

Bright like the sun; resplendent.

Flashing beams of that

sunshiny

shield.

Spenser.

Beaming with good spirits; cheerful.

“Her sunshiny face.”

Spenser.

Adj.

Bright with the rays of the sun; clear, warm or pleasant; as a sunshiny day; sunshiny weather.

Bright like the sun.

--Flashing beams of that sunshiny shield.

sunshiny ‎(comparative more sunshiny, superlative most sunshiny)

Sunny, full of sunshine.
- Charles Reade
  There are men that roll through life like a fire-new red ball going across Mr. Lord's cricket ground on a sunshiny day […]
Bright, as though with sunshine; shining.
- 1590, Edmund Spenser, The Faerie Queene, I.12:
  The blazing brightnesse of her beauties beame, / And glorious light of her sunshyny face / To tell, were as to striue against the streame.
Cheerful, happy.
Flowers can make any room sunshiny.