legal Definition of ratio decidendi
:the principle or rule constituting the basis of a court decision
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ratio decidendi
noun
ra·tio de·ci·den·di
\
ˈrā-shē-ˌō-ˌde-sə-ˈden-ˌdī, ˈrā-ˌshō-, -ˌdā-sē-ˈden-dē
\
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Origin and Etymology of ratio decidendi
Latin, grounds for deciding
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