ex_post_facto
1. [ adjective ] affecting things past
Synonyms: retroactive retro
Examples:

"retroactive tax increase" "an ex-post-facto law" "retro pay"

Related terms: retrospective
2. [ adjective ] affecting things past
Synonyms: retroactive
Examples:

"retroactive tax increase" "an ex-post-facto law" "retro pay"

Related terms: retrospective
Similar spelling:   expostulation
  expostulate