To counteract, to act against, to frustrate.
To recall a person or unit with such an order.
To revoke (a former command); to cancel or rescind by giving an order contrary to one previously given.
To cancel an order for (some specified goods).
An order to the contrary of a previous one.
To use a veto against.
An invocation of that right.
A technique or mechanism for discarding what would otherwise constitute a false positive in a scientific experiment
A political right to disapprove of (and thereby stop) the process of a decision, a law etc.
An authoritative prohibition or negative; a forbidding; an interdiction.