Usually means: From the beginning; first principles.
Definitions Related words Phrases Mentions
We found 25 dictionaries that define the word ab initio:

General (14 matching dictionaries)
  1. ab initio: Merriam-Webster
  2. ab initio: Oxford Learner's Dictionaries
  3. ab initio: American Heritage Dictionary of the English Language
  4. ab initio: Collins English Dictionary
  5. ab initio: Vocabulary.com
  6. ab initio: Wordnik
  7. ab initio: Wiktionary
  8. ab initio: Dictionary.com
  9. Ab Initio (company), Ab Initio, Ab-initio, Ab initio (disambiguation), Ab initio: Wikipedia, the Free Encyclopedia
  10. ab initio: Rhymezone
  11. ab initio: FreeDictionary.org
  12. ab initio: Mnemonic Dictionary
  13. ab initio: TheFreeDictionary.com
  14. ab initio: Merriam-Webster

Business (9 matching dictionaries)
  1. ab initio: Merriam-Webster Legal Dictionary
  2. Duhaime's Canadian law dictionary (No longer online)
  3. ab initio: Law.com Dictionary
  4. Everybody's Legal Dictionary (No longer online)
  5. THE 'LECTRIC LAW LIBRARY'S REFERENCE ROOM (No longer online)
  6. Glossary of Legal Terms (No longer online)
  7. Ab initio: A DICTIONARY OF LAW (1893)
  8. Bouvier's Law Dictionary 1856 Edition (No longer online)
  9. Ab-initio, ab initio: Legal dictionary

Miscellaneous (1 matching dictionary)
  1. AB INITIO, AB INITIO, AB INITIO: Terminology and Descriptions of Geneaological Words

Tech (1 matching dictionary)
  1. A Gliding Glossary (No longer online)

Definitions from Wiktionary (ab initio)

adverb:  (law) From the time when a law, legal right or decree, contract, ownership interest, partnership (etc.) comes into force.
adverb:  2007, Parliament of India, “Section 14”, in Prohibition of Child Marriage Act, 2006, page 4:
adverb:  (sciences) Calculated from first principles, i.e. from basic laws without any further additional assumptions.
adverb:  (of an academic course) Taken with no prior qualifications.

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