When the sun or a light shines, it gives out bright light.

If you shine a torch or other light somewhere, you point it there, so that you can see something when it is dark.

Something that shines is very bright and clear because it is reflecting light.

Something that has a shine is bright and clear because it is reflecting light.

If you shine a wooden, leather, or metal object, you make it bright by rubbing or polishing it.

Someone who shines at a skill or activity does it extremely well.

If you say that someone has taken a shine to another person, you mean that he or she liked them very much at their first meeting.