Symbol binding, function property
A symbol can have a value and a function binding at the same time.
> (defun foo (n) "Returns n plus two." (+ n 2) )
It is INTERNAL in the COMMON-LISP-USER package.
Its function binding is #<Interpreted Function FOO>
The function takes arguments ()
Its property list has these indicator/value pairs:
EXCL::%FUN-DOCUMENTATION "Returns n plus two."