Major Section: MISCELLANEOUS
Example and General Form: ACL2 !>:redef- ACL2 p!>
This macro, for system hackers only, is a convenient way to reverse the
effects of :redef+. See redef+.
Note that this macro starts by executing :redef+, in case some effects of
a previous :redef+ have already been removed or perhaps :redef+ had
not been done at all.