From time to time you might want to void (unbind) a variable or a
function definition in Emacs. Most often you’ll probably be dealing
with variables created with
defvar, whose values you’ll want to
update. The magic functions you need are the following:
;; this will make the symbol my-nasty-variable's value void (makunbound 'my-nasty-variable) ;; this will make the symbol my-nasty-function's ;; function definition void (fmakunbound 'my-nasty-function)
The names aren’t exactly intuitive and even I happen to forget them from time to time.