Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary
1

ex post facto

play
adverb ex post fac·to \ˌeks-ˌpōs(t)-ˈfak-(ˌ)tō\

Definition of ex post facto

  1. :  after the fact :  retroactively



Origin of ex post facto

Late Latin, literally, from a thing done afterward


First Known Use: 1621


2

ex post facto

adjective ex post fac·to

Definition of ex post facto

  1. :  done, made, or formulated after the fact :  retroactive <ex post facto approval> <ex post facto laws>



1787

First Known Use of ex post facto

1787


Seen and Heard

What made you want to look up ex post facto? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

February 6, 2016

an official order, decree, or edict

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image1037863653

Which of the following refers to thin, bending ice, or to the act of running over such ice?

duvet pince-nez spindrift kittly-benders
Name That Thing

10 quick questions: hear them, spell them, and see how your skills compare to the crowd.

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ