UNDEFINE_KEY

     Removes the current binding from the key you specify.

  Syntax

     UNDEFINE_KEY (keyname [,string])

  Parameters

     keyname    Specifies the key (or key combination) you want to undefine.
                (See help on KEYNAMES TABLE.)

     string     A key map or a key-map list in which the key is defined.
                The first definition of the key in the key maps that make up
                the key-map list is deleted.  If neither a key map nor a
                key-map list is specified, the key-map list bound to the the
                current buffer is used.

  Examples

     1.  UNDEFINE_KEY (CTRL_Z_KEY);

         Undefines CTRL/Z (the combination of the CTRL key and the
         letter Z).

     2.  UNDEFINE_KEY (KEY_NAME ("r", SHIFT_KEY));

         Undefines the combination of the DECTPU shift key (by default, PF1)
         and the letter R.

  Related topics

     DEFINE_KEY   KEYNAMES TABLE  NONDEFINABLE KEYS   SHIFT_KEY