contingent

An event which may or may not happen; that which is unforeseen, undetermined, or dependent on something in the future.

That which falls to one in a division or apportionment among a number; a suitable share.

A quota of troops.

Arrests and prosecutions intensified after Isis captured Mosul in June, but the groundwork had been laid by an earlier amendment to Jordan’s anti-terrorism law. It is estimated that 2,000 Jordanians have fought and 250 of them have died in Syria – making them the third largest Arab contingent in Isis after Saudi Arabians and Tunisians.

Possible or liable, but not certain, to occur.

Dependent on something that is undetermined or unknown, that may or may not occur.

The success of his undertaking is contingent upon events which he cannot control.

a contingent estate

Not logically necessarily true or false.

Temporary.

contingent labor

contingent worker