This command unloads the library that provided feature @var{feature}.
It undefines all functions, macros, and variables defined in that
library with @code{defconst}, @code{defvar}, @code{defun},
-@code{defmacro}, @code{defsubst}, @code{definf-function} and
+@code{defmacro}, @code{defsubst}, @code{define-function} and
@code{defalias}. It then restores any autoloads formerly associated
with those symbols. (Loading saves these in the @code{autoload}
property of the symbol.)