Is it possible to have an alias for the function name in Lisp?

Question

...just like packages do.

I use Emacs (maybe, it can offer some kind of solution).

For example (defun the-very-very-long-but-good-name () ...) is no

Answer 1

If your problem is that you can't remember a very long function name, but you remember PART of the name, that's what "apropos" is for. In my Emacs, I have "C-h a" bound to "hyper-apropos". You enter a substring of the symbol you're looking for, and it lists all the matches.