English Explanatory Dictionary

ratio decidendi

English dictionary entry

Meanings

noun
  1. The legal principle or rationale on which a judicial decision is based.

Word forms

ratio decidendi rationes decidendi

Etymology

Borrowed from Medieval Latin ratiō dēcidendī, from ratiō (“reckoning, method, reasoning”) + dēcidendī, genitive singular of dēcidendus, gerund of dēcidere (“to settle”).

Related words

obiter obiter dictum
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