Lat. From the beginning; from the first act A party is said .to be a trespasser ab initio, an estate to he* good ab initio, an agreement or deed to be void ab initio, a marriage to be unlawful ab initio, and the like. Plow. 6a, 16a; 1 BI. Comm. 440
Source: Black's Law Dictionary 2nd Ed (1910)
