Etymology

Noun

1. The direct rays, light or warmth of the sun.

   We were warmed by the bright sunshine.

2. A location on which the sun's rays fall.

   We moved out of the shade and into the sunshine.

3. geniality or cheerfulness.

   I enjoyed the sunshine of her smile.

4. A source of cheerfulness or joy.
5. The effect which the sun has when it lights and warms some place.
6. friendly form of address often reserved for juniors.

   Alright sunshine, safe to cross now.

7. ironic form of address used maliciously or rudely.

   OK, sunshine, listen up and listen good. There's five vandalised telephone boxes out there and I know you're responsible.

Adjective

1. Open to and permitting public access, especially with regard to activities that were previously closed-door or back-room meetings.

   Because of the sunshine law, we could go to the planning meeting.