What is the meaning of the word "bright"?

Definitions:

characterized by happiness or gladness adjective
- bright faces
characterized by quickness and ease in learning adjective
- some children are brighter in one subject than another
clear and sharp and ringing adjective
- the bright sound of the trumpet section
emitting or reflecting light readily or in large amounts adjective
- the sun was bright and hot
full or promise adjective
- had a bright future in publishing
having lots of light either natural or artificial adjective
- the room was bright and airy
having striking color adjective
- bright dress
splendid adjective
- the bright stars of stage and screen