Latin. Notio is a Latin phrase which, in the civil law, refers to the power of hearing and trying a matter of fact; the power or authority of a judex; the power of hearing causes and pronouncing sentence, without any degree of jurisdiction. Related entries Pecus In Futuro Posse Comitatus Notitia Lex Fori Donec Flagrante Delicto Retractus Feudalis Retractus Aquae Et Al.