A define-method-combination arguments lambda list is used by the :arguments option to define-method-combination.
A define-method-combination arguments lambda list can contain the lambda list keywords shown in the next figure.
&allow-other-keys &key &rest &aux &optional &whole
Figure 3-21. Lambda List Keywords used by Define-method-combination arguments Lambda Lists
Define-method-combination arguments lambda lists are similar to ordinary lambda lists, but also permit the use of &whole.