IGNORANTIA LEGIS NON EXCUSAT TheLaw.com Law Dictionary & Black's Law Dictionary 2nd Ed.Latin maxim meaning ignorance of the law is not an excuse. Related Posts:IGNORANTIA FACTI EXCUSAT IGNORANTIA JURIS NON EXCUSATIGNORANCE OF THE LAWIMPOTENTIA EXCUSAT LEGEMINJURIA NON EXCUSAT INJURIAMRATIO EST LEGIS ANIMA MUTATA LEGIS RATIONE MUTATUR ET LEXIGNORANTIA