a list, the elements of which are implementation-dependent, but which must contain at least the symbols &allow-other-keys, &aux, &body, &environment, &key, &optional, &rest, and &whole.
A list of all the lambda list keywords used in the implementation, including the additional ones used only by macro definition forms.
defun [Macro] , flet, labels, macrolet [Special Operator] , defmacro [Macro] , macrolet, The Evaluation Model