What is the meaning of the word "appear"?

Definitions:

to be issued or published verb
- Did your latest book appear yet?
to come into being or existence verb
- The cop suddenly appeared on the crime scene.
to come into sight or view verb
- I suddenly appeared at the wedding.
to give a certain impression or have a certain outward aspect verb
- They appeared to be in a bad mood.
to present oneself formally, as before an authority verb
- I had to appear in court last month.
to seem to be true, probable, or apparent verb
- That answer appears to be reasonable.
to show up as a character on stage, a play, or other similar media verb
- Gielgud appears briefly in this movie.