ex post facto

1. 1.

   affecting things past

   “retroactive tax increase”

   “an ex-post-facto law”

   “retro pay”

   Synonymsretroactiveretro

   Similarretrospective

Questions about ex post facto

What does ex post facto mean?

ex post facto means "affecting things past".

What is another word for ex post facto?

Close synonyms include retroactive, retro. Each sense on this page lists its own synonyms, because a word with several meanings rarely has one substitute that works for all of them.

Is ex post facto a common word?

ex post facto is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.