0 to change an order that has already been given, especially by giving a new order
1 to change an order that has already been given, especially by giving a new order:
I thought at first she was going to the church to countermand the wedding preparations.
The man told her that he understood that she had countermanded her order.
The movement was countermanded and the troops were withdrawn.
Ironically, it also has directly countermanded the national sense of equality, egalitarianism, and fairness in the allocation of organs.
The stop task usually involves the presentation of an infrequent signal (a tone) that countermands the go signal.
However, in the 1990s governments have tended to try to countermand such rules in order to promote labour market flexibility.