Pronunciation: /ɛks poʊst ˈfæk.toʊ/
adjective relating to or being a law that retroactively changes the legal consequences of actions that were committed, or relationships that existed, before the enactment of the law
A1 I don't understand the concept of ex post facto laws.
A2 The new policy cannot be applied ex post facto.
B1 The ex post facto decision caused confusion among the employees.
B2 The ex post facto changes to the contract were unexpected.
C1 The ex post facto analysis revealed flaws in the original study design.
C2 The ex post facto justification for the decision was not convincing.
adverb in a manner that applies retroactively
A1 I didn't know the rules beforehand, so I can't be punished ex post facto.
A2 The new law cannot be applied ex post facto to previous cases.
B1 The company changed its policy ex post facto, causing confusion among employees.
B2 The court ruled that the regulation could not be enforced ex post facto.
C1 The government's decision to implement the tax law ex post facto was met with criticism.
C2 The retrospective application of the new regulation ex post facto raised concerns among legal experts.
formal The new law cannot be applied ex post facto to punish past actions.
informal You can't get in trouble for something that wasn't against the rules ex post facto.
slang They can't retroactively punish you for that, it's ex post facto.
figurative Trying to change the rules ex post facto is like moving the goalposts after the game has ended.
ex post factoed
ex post factos
more ex post facto
most ex post facto
ex post facts
will be ex post facto
have been ex post facto
is being ex post facto
ex post facto
ex post facto
to ex post facto
ex post factoring
ex post factoing