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ipse dixit

American  
[ip-se dik-sit, ip-see dik-sit] / ˈɪp sɛ ˈdɪk sɪt, ˈɪp si ˈdɪk sɪt /

noun

  1. an assertion without proof.


ipse dixit British  
/ ˈɪpseɪ ˈdɪksɪt /

noun

  1. an arbitrary and unsupported assertion

"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

Etymology

Origin of ipse dixit

< Latin: he himself said it

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.

See Examples For:

Today’s decision reveals California’s considerable wingspan: That case’s ipse dixit now apparently governs all APA challenges to grant-funding determinations that the government asks us to address in the context of an emergency stay application.

From Slate Jan. 3, 2026

I was afraid he might push out, because he was, in a way a human dynamo and, at the time of his supremacy, might have controlled 150,000 votes in Indiana by his "ipse dixit!"

From Time Magazine Archive

Let us have something more than the ipse dixit of the Society.

From Thoughts on African Colonization by William Lloyd Garrison

Page 134—lawer’s amended to lawyer’s—"... on a word, or a lawyer’s ipse dixit."

From Winterslow Essays and Characters Written There by William Hazlitt

St. Paul to you may be infallible, But Science is so unaccommodating, If not irreverent, she'll not accept His ipse dixit as an axiom.

From The Woman Who Dared by Epes Sargent

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