Pronunciation: (sun'shīn"),[key] —n. 1. the shining of the sun; direct light of the sun.
2. brightness or radiance; cheerfulness or happiness.
3. a source of cheer or happiness.
4. the effect of the sun in lighting and heating a place.
5. a place where the direct rays of the sun fall.
—adj. 1. of or pertaining to sunshine laws: sunshine rules. 2. fair-weather (def. 2).