petitio principii

noun (1)
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

 (Entry 1 of 3)

: 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

pluris petitio

noun (2)
plu·​ris pe·​ti·​tio | \ ˈplu̇rə̇spə̇ˈtishēˌō\

Definition of pluris petitio (Entry 2 of 3)

Scots law

plus petitio

noun (3)
plus pe·​ti·​tio | \ ˈpləspə̇ˈtishēˌō\

Definition of plus petitio (Entry 3 of 3)

Roman, civil, & Scots law
: a demanding by the plaintiff in his pleading of more than he proves either in amount or as to time or condition of performance

First Known Use of petitio principii

Noun (1)

circa 1531, in the meaning defined above

History and Etymology for petitio principii

Noun (1)

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

Noun (2)

Latin, act of asking for more

Noun (3)

Late Latin, from Latin plus more + petitio petition

Keep scrolling for more

Learn More about petitio principii

Statistics for petitio principii

Look-up Popularity

Time Traveler for petitio principii

The first known use of petitio principii was circa 1531

See more words from the same year

Comments on petitio principii

What made you want to look up petitio principii? Please tell us where you read or heard it (including the quote, if possible).


to mark by some ceremony or observation

Get Word of the Day daily email!

Test Your Vocabulary

Challenging Vocabulary Quiz Returns!

  • stylized drawing of woman pole vaulting across gap to get trophy
  • Which is a synonym of fuliginous?
True or False

Test your knowledge - and maybe learn something along the way.

Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

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