ab initioab in·i·ti·o
Origin of ab initioClassical Latin
Origin of ab initioLatin ab initi&omacron; : ab, from + initi&omacron;, ablative of initium, beginning.
- (law) From the time when a legal document comes into force. [Early 17th century.]
- (sciences) Calculated from first principles, i.e. from basic laws without any further additional assumptions.
- (of an academic course) Taken with no prior qualifications.
ab initio - Legal Definition