die is cast

die is cast

Prov. A process is past the point of no return. (The die is one of a pair of dice. The cast means thrown. This phrase [in Latin] was said by Julius Caesar when he crossed the Rubicon with his legions, starting a civil war.) After that speech favoring reform of the education system, the die is cast. This is now a campaign issue. The die is cast. There is no turning back on this point.
See also: cast, die