Ｓ

What does Ｓ mean in English?

1. S; s(n)
2. south(n)
3. sulfur(n)
4. nth year in the Shōwa era (1926.12.25-1989.1.7)(pref)
5. small(n)
6. second(n)
7. subject (grammar)(n)
8. sadist; sadistic(n)
9. S rank (usu. top rank on a SABCDEF scale); S grade; best class(n)