Definition of "ab initio" 
- (adverb) From the beginning.
Use "ab initio" in a sentence
- ""Apostolicae sedi et antiquis ab initio nascentis ecclesiae et catholicis traditionibus tota mentis intentione, tota cordis alacritate, me conjungo."
- "When she spoke of “adoptio” by God, or of “participatio dei,” for example, although a spiritual relationship continued to be understood, yet its basis and reality lay in a sacramental renewal of the physical nature: “Non ab initio dii facti sumus; sed primo quidem homines, tunc demum dii” (We were not made gods at first; at first we were men, thereafter we became gods at length)."
- "*  Eâ gratiâ fit ab initio fidei suæ homo quicunque Christianus, quâ gratiâ homo ille ab initio factus est Christus"