The rule of law on which a judicial decision is based.
- ‘Courts are bound by principles of law, the ratio decidendi of cases.’
- ‘You must then deal fully with the ratio decidendi of the case, with a detailed analysis of Lord Templeman's judgment on behalf of the majority.’
- ‘If property suddenly became available all over the country many of the rationes decidendi of the past would be quite inappropriate.’
- ‘I do not find it easy to discover the ratio decidendi of Pook's case.’
- ‘The former are described as being the ratio decidendi (reasons for the decision).’
- ‘If the Court refuses that, there are some interesting arguments about how one determines ratio decidendi.’
Latin, literally reason for deciding.