ex post facto

Meaning

Adj

1. (not-comparable) Retroactive.
2. (not-comparable) Retroactive.

Adv

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

Synonyms

retro

retroactive

reactive

Translations

rétroactif

ex post facto

retroactiu

retrò

rétro

retroactiu

Etymology

From Latin ex (“from”) + post (“after”) + facto, 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.)