a priori
UK /ˌɑː pɹiˈɔːɹi/ · US /ˌɑ pɹiˈoɹi/ adjective, adverb
Forms apriori
- adjective Self-evident, intuitively obvious.
- adjective Presumed without analysis.
- adjective (logic) Based on hypothesis and theory rather than experiment or empirical evidence. “In his opening argument, the student mentioned nothing beyond his a priori knowledge.”
- adjective (linguistics, conlanging) Developed entirely from scratch, without deriving it from existing languages.
- adverb (logic) In a way based on theoretical deduction rather than empirical observation.
Synonyms
Antonyms
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”).
Webster’s 1913
- Characterizing that kind of reasoning which deduces consequences from definitions formed, or principles assumed, or which infers effects from causes previously known; deductive or deductively. The reverse of a posteriori.
- Applied to knowledge and conceptions assumed, or presupposed, as prior to experience, in order to make experience rational or possible.
Etymology [L. a (ab) + prior former.]
Sources: Wiktionary · Webster’s 1913 — from the Wiktionary entry “a priori”, CC BY-SA 4.0. Details