ratio decidendi

English

Etymology

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

Noun

ratio decidendi (plural rationes decidendi)

  1. (law) The legal principle or rationale on which a judicial decision is based.

Translations