ab initio[ab′i nis̸h′ē ō′, -nis̸h′ō]
from the beginning
Origin of ab initioClassical Latin
From the beginning.
Origin of ab initioLatin ab initiō : ab, from + initiō, 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
From the first act. From the beginning; back to one’s creation or inception.