Phrase guide

petitio principii

noun · 3 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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  • Received-Pronunciation: /pɪˈtɪʃiˌəʊ prɪnˈkɪpiˌaɪ/
  • General-American: pə-tĭshʹē-ō' prĭn-sĭpʹē-ī'
  • General-American: /pəˈtɪʃiˌoʊ prɪnˈsɪpiˌaɪ/

1

noun

Meaning 1

The logical fallacy of begging the question (i.e., "assuming the conclusion").

Definition source: English Wiktionary via Wiktextract

Usage: uncountable

Topics: human-sciences, logic, mathematics, philosophy, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

A particular argument which commits the fallacy of begging the question; a circular argument.

Definition source: English Wiktionary via Wiktextract

Usage: countable

Topics: human-sciences, logic, mathematics, philosophy, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

the logical fallacy of assuming the conclusion in the premises; begging the question

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: petitio

Antonyms: none provided

Broader terms: logical fallacy

History

Etymology

From Latin petītiō prīncipiī (literally “an assumption from the beginning”), calque of Ancient Greek τὸ ἐν ἀρχῇ αἰτεῖσθαι (tò en arkhēî aiteîsthai, “to assume from the beginning”).