Definition of ipse dixit in English:

ipse dixit

noun

  • A dogmatic and unproven statement.

    • ‘Recent Supreme Court decisions emphasize the need to regulate the admissibility of expert testimony by means of standards that require opinions to go beyond ipse dixit--that is, that are based on more than the fact that the expert said it.’
    • ‘Overall, the Court's peremptory style in addressing the jus ad bellum reflects an unfortunate ipse dixit approach to judicial reasoning.’
    statement, report, declaration, proclamation, pronouncement
    View synonyms

Origin

Latin, literally he himself said it, translating Greek autos epha, a phrase used of Pythagoras by his followers.

Pronunciation:

ipse dixit

/ˌɪpsiː//ˌɪpseɪ ˈdɪksɪt/