petitio principii

noun
pe·​ti·​tio prin·​ci·​pii | \ pə-ˈtē-tē-ˌō-(ˌ)priŋ-ˈki-pē-ˌē How to pronounce petitio principii (audio) \

Definition of petitio principii

: a logical fallacy in which a premise is assumed to be true without warrant or in which what is to be proved is implicitly taken for granted

First Known Use of petitio principii

circa 1531, in the meaning defined above

History and Etymology for petitio principii

Medieval Latin, literally, postulation of the beginning, begging the question

Learn More About petitio principii

Time Traveler for petitio principii

Time Traveler

The first known use of petitio principii was circa 1531

See more words from the same year

Dictionary Entries Near petitio principii

petition of right

petitio principii

petit jury

See More Nearby Entries 

Statistics for petitio principii

Cite this Entry

“Petitio principii.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/petitio%20principii. Accessed 18 Jan. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

WORD OF THE DAY

Test Your Vocabulary

Name that Thing: Flower Edition

How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!