Countermand vs Uncountermanded - What's the difference?

As a verb countermand

is to revoke (a former command); to cancel or rescind by giving an order contrary to one previously given.

is an order to the contrary of a previous one.

not countermanded; unopposed.

(en verb)

To revoke (a former command); to cancel or rescind by giving an order contrary to one previously given.

to countermand an order for goods

To recall a person or unit with such an order.

To prohibit; to forbid.

* Harvey

Avicen countermands letting blood in choleric bodles.

To oppose; to revoke the command of.

* Hooker

For us to alter anything, is to lift ourselves against God; and, as it were, to countermand him.

(en noun)

An order to the contrary of a previous one.

(-)

Not countermanded; unopposed.