Meaning of ab initio in English:

ab initio

Pronunciation /ˌab ɪˈnɪʃɪəʊ/

See synonyms for ab initio

adverb

formal Law
  • From the beginning.

    ‘the agreement should be declared void ab initio’
    • ‘Enormous as the difference undoubtedly is between these faculties in the two cases, the difference is conceded not to be one existing ab initio.’
    from the beginning, from the start, initially, originally, from first principles, to begin with, to start with, primarily
    View synonyms

adjective

formal Law
attributive
  • Starting from the beginning.

    • ‘he was instructing ab initio pilots’

Origin

Latin.