Definition of res judicata in English:

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res judicata

Pronunciation: /reɪz ˌdʒuːdɪˈkɑːtə/

noun (plural res judicatae /ˌdʒuːdɪˈkɑːtʌɪ/ /ˌdʒuːdɪˈkɑːtiː/)

A matter that has been adjudicated by a competent court and therefore may not be pursued further by the same parties.
Example sentences
  • The effect of this judgment was that the validity of the patent was for the purposes of the inquiry res judicata as between the parties to the action.
  • The Federal Magistrate considered that the matter was res judicata by reason of the previous application to the Federal Court, and dismissed the application.
  • The doctrine of res judicata prevents the retrial of judicially settled issues and asserts the finality of judges' decisions.


Latin, literally 'judged matter'.

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