Phrase guide

a priori

adj · adv · 8 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

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • Received-Pronunciation: /ˌɑː pɹiˈɔːɹi/
  • Received-Pronunciation: /ˌeɪ pɹaɪˈɔːɹaɪ/
  • General-American: /ˌɑ pɹiˈoɹi/
  • General-American: /ˌæ pɹiˈoɹi/
  • General-American: /ˌeɪ pɹiˈoɹi/
  • General-American: /ˌeɪ pɹaɪˈoɹaɪ/
  • Southern-England: Recorded audio is listed in the source snapshot.
  • rhymes with -ɔːɹi
  • rhymes with -ɔːɹaɪ

1

adj

Meaning 1

Self-evident, intuitively obvious.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

adj

Meaning 2

Presumed without analysis.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

adj

Meaning 3

Based on hypothesis and theory rather than experiment or empirical evidence.

Definition source: English Wiktionary via Wiktextract

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

Examples

  • In his opening argument, the student mentioned nothing beyond his a priori knowledge.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

adj

Meaning 4

Developed entirely from scratch, without deriving it from existing languages.

Definition source: English Wiktionary via Wiktextract

Topics: human-sciences, linguistics, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

adv

Meaning 5

In a way based on theoretical deduction rather than empirical observation.

Definition source: English Wiktionary via Wiktextract

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

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: deductively[Appendix:Glossary

Antonyms: a posteriori, inductively

6

adjective

Meaning 6

involving deductive reasoning from a general principle to a necessary effect; not supported by fact

Definition source: Princeton WordNet 3.0

Examples

  • an a priori judgment

Meaning relationships

Synonyms: none provided

Antonyms: a posteriori

7

adjective satellite

Meaning 7

based on hypothesis or theory rather than experiment

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

8

adverb

Meaning 8

derived by logic, without observed facts

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: a posteriori

History

Etymology

First attested in 1610. Learned borrowing from Medieval Latin ā priōrī (“involving reasoning from cause to effect; from first principles”, literally “from the former”).

Across languages

Translations

70 source translations are retained for this English entry.

  • Arabic: مُسَلَّم بِه (musallam bih) — logic: based on hypothesis rather than experiment
  • Arabic: لَا يُحْتَاجُ إِثْبَاتَة إِلَى تَجْرِبَة — logic: based on hypothesis rather than experiment
  • Belarusian: апрыёрны (apryjórny) — logic: based on hypothesis rather than experiment
  • Chinese Mandarin: 先驗 /先验 (xiānyàn) — logic: based on hypothesis rather than experiment
  • Danish: a priori — logic: based on hypothesis rather than experiment
  • Finnish: apriorinen — logic: based on hypothesis rather than experiment
  • Finnish: hypoteettinen — logic: based on hypothesis rather than experiment
  • Greek: επαγωγικός (epagogikós) — logic: based on hypothesis rather than experiment
  • Greek: συμπερασματικός (symperasmatikós) — logic: based on hypothesis rather than experiment
  • Hindi: प्रागनुभविक (prāgnubhvik) — logic: based on hypothesis rather than experiment
  • Hindi: अनुभवनिरपेक्ष (anubhvanirpekṣ) — logic: based on hypothesis rather than experiment
  • Italian: a priori — logic: based on hypothesis rather than experiment
  • Italian: teorico — logic: based on hypothesis rather than experiment
  • Italian: preconcetto — logic: based on hypothesis rather than experiment
  • Korean: 선험적인 (seonheomjeogin) — logic: based on hypothesis rather than experiment
  • Norwegian Bokmål: a priori — logic: based on hypothesis rather than experiment
  • Polish: a priori — logic: based on hypothesis rather than experiment
  • Polish: aprioryczny — logic: based on hypothesis rather than experiment
  • Polish: apriorystyczny — logic: based on hypothesis rather than experiment
  • Portuguese: a priori — logic: based on hypothesis rather than experiment
  • Russian: априо́рный (apriórnyj) — logic: based on hypothesis rather than experiment
  • Russian: доо́пытный (doópytnyj) — logic: based on hypothesis rather than experiment
  • Russian: предположи́тельный (predpoložítelʹnyj) — logic: based on hypothesis rather than experiment
  • Spanish: a priori — logic: based on hypothesis rather than experiment
  • Tagalog: matwiranin — logic: based on hypothesis rather than experiment
  • Turkish: apriori — logic: based on hypothesis rather than experiment
  • Turkish: önsel — logic: based on hypothesis rather than experiment
  • Ukrainian: апріо́рний (apriórnyj) — logic: based on hypothesis rather than experiment
  • Vietnamese: tiên nghiệm — logic: based on hypothesis rather than experiment
  • Finnish: itsestäänselvä — self-evident, intuitively obvious
  • Finnish: itsestään selvä — self-evident, intuitively obvious
  • Finnish: oletusarvoinen — self-evident, intuitively obvious
  • Polish: a priori — self-evident, intuitively obvious
  • Spanish: a priori — self-evident, intuitively obvious
  • Finnish: lähtökohtainen — presumed without analysis
  • Finnish: oletusarvoinen — presumed without analysis
  • Finnish: apriorinen — presumed without analysis
  • Polish: a priori — presumed without analysis
  • Spanish: a priori — presumed without analysis
  • Finnish: fiktiivinen — linguistics: developed entirely from scratch
  • Polish: a priori — linguistics: developed entirely from scratch
  • Spanish: a priori — linguistics: developed entirely from scratch
  • Arabic: مُسَبَّق (musabbaq) — derived by logic
  • Belarusian: апрыёры (apryjóry) — derived by logic
  • Chinese Mandarin: 先驗 /先验 (xiānyàn) — derived by logic
  • Czech: a priori — derived by logic
  • Dutch: a priori — derived by logic
  • Finnish: apriorisesti — derived by logic
  • Finnish: a priori — derived by logic
  • French: a priori — derived by logic
  • Galician: a priori — derived by logic
  • Georgian: აპრიორი (aṗriori) — derived by logic
  • German: a priori — derived by logic
  • Greek: εκ των προτέρων (ek ton protéron) — derived by logic
  • Hebrew: אפריורי (apriori) — derived by logic
  • Hindi: पूर्वसिद्ध (pūrvasiddh) — derived by logic
  • Italian: a priori — derived by logic
  • Japanese: アプリオリ (apuriori) — derived by logic
  • Norwegian Bokmål: a priori — derived by logic
  • Polish: a priori — derived by logic
  • Polish: apriorycznie — derived by logic
  • Portuguese: a priori — derived by logic
  • Romanian: a priori — derived by logic
  • Russian: априо́ри (aprióri) — derived by logic
  • Russian: зара́нее (zaráneje) — derived by logic
  • Russian: незави́симо от о́пыта (nezavísimo ot ópyta) — derived by logic
  • Russian: до о́пыта (do ópyta) — derived by logic
  • Spanish: a priori — derived by logic
  • Turkish: önsel — derived by logic
  • Ukrainian: апріо́рі (aprióri) — derived by logic