ratio decidendi

noun
ra·​tio de·​ci·​den·​di | \ˈrā-shē-ˌō-ˌde-sə-ˈden-ˌdī, ˈrā-ˌshō-, -ˌdā-sē-ˈden-dē\

Legal Definition of ratio decidendi 

: the principle or rule constituting the basis of a court decision

History and Etymology for ratio decidendi

Latin, grounds for deciding

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