0 (of a law or decision) in a way that has effect from a date before it was approved:
1 with effect from a date in the past before a law, decision, etc. was approved:
The legislation applies retroactively to January 1.
A student can apply after the fact, and we'll process it retroactively.
The management retroactively approved some of those expenditures.
Consequently, existing classes cannot be made to model new concepts retroactively, unless their definitions can be modified.
In this way, it retroactively makes the structure incomplete without it.
Furthermore, the regulation makes it clear that an aid cannot retroactively become incompatible with the single market.
Consequently, the previous government's binding policy package was retroactively abolished, and the incoming government refrained from further intervention in incomes policy.
Consider a case in which law is made to apply only retroactively.
