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ex post

American  
[eks pohst] / ɛks ˈpoʊst /

adjective

  1. based on analysis of past performance (opposed to ex ante).


Etymology

Origin of ex post

1635–45; < Latin: from (what lies) behind, according to (what lies) behind

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

No relevant precedent existed, and given the unique crimes the Nazi hierarchy had committed, it would require ex post facto laws to prosecute them.

From Salon • May 18, 2026

The effects have been so strong that the Fed, in a heroic feat of ex post facto rationalization, has begun to think of asset prices as another transmission mechanism for its balance-sheet policy instrument.

From The Wall Street Journal • Apr. 21, 2026

“This is a violation of the ex post facto clause of the constitution,” said Neama Rahmani, president of West Coast Trial Lawyers.

From Washington Times • Feb. 10, 2023

"A greater ex ante national ownership of the design of fiscal trajectories could be balanced by a stronger ex post enforcement at EU level," he said.

From Reuters • Oct. 10, 2022

There is reason to believe that recollection was an ex post facto elaboration; those on the scene recall a sensation more suggestive of relief and euphoria in the air.

From "Big Science" by Michael Hiltzik

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