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ab initio

American  
[ahb i-nit-ee-oh, ab i-nish-ee-oh] / ɑb ɪˈnɪt iˌoʊ, æb ɪˈnɪʃ iˌoʊ /

adverb

Latin.
  1. from the beginning.


ab initio British  
/ æb ɪˈnɪʃɪˌəʊ /
  1. from the start; from scratch

    ab initio courses

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Many universities now offer "ab initio" undergraduate courses for languages, meaning you can start as a complete beginner - something Prof Koglbauer says has bolstered uptake.

From BBC • Dec. 15, 2025

One class of methods used by nuclear physicists to study atomic nuclei is the ab initio approach.

From Science Daily • May 15, 2024

The extensive ab initio molecular dynamics simulations used in this study were still limited by their short time and length scales and high computational costs in representing the chemical reactions.

From Science Daily • Dec. 4, 2023

In that sense, the void ab initio doctrine is a tool of accountability.

From Slate • Nov. 16, 2022

In ideation the primal bases of thought must have been founded, ab initio, upon sensual perceptions; hence, must have been materialistic and natural.

From Religion and Lust or, The Psychical Correlation of Religious Emotion and Sexual Desire by Weir, James