delete $ASSOC{KEY}

             Deletes the specified value from the specified asso-
             ciative  array.   Returns  the deleted value, or the
             undefined value if nothing  was  deleted.   Deleting
             from $ENV{} modifies the environment.  Deleting from
             an array bound to a dbm file deletes the entry  from
             the dbm file.

             The following deletes all the values of an  associa-
             tive array:

                  foreach $key (keys %ARRAY) {
                       delete $ARRAY{$key};
                  }

             (But it would be faster to use  the  reset  command.
             Saying undef %ARRAY is faster yet.)