Question

what does veteran day really mean

Answer 1

its is to celebrate the memories
of our soliders

Answer 2

Memorial Day is specifically for those who have died.
Veterans Day is specifically for those who live.
It is not worth discussing how small an error it is to get them mixed up.

A common way to describe it is this:
1) Veteran's Day is to honor those who wore the uniform.
2) Memorial Day is to honor those whose uniform is the last thing they wore.