ex post facto

Meanings

1. Retroactive.
2. Formulated or enacted after some event, and then retroactively applied to it.

1. By retroactive application of a law formulated or enacted after the deed in question.

Etymology

From Latin ex (“from”) + post (“after”) + factō, ablative of factum (“deed”). In Latin, ex takes the ablative case, while post takes the accusative case. (See Wikipedia for a discussion of the grammatical form and usage of this phrase.)

Translations