A priori and a posteriori are terms that are used especially in logic and philosophy. A priori is from Latin ā priōrī, which means literally, "from what is earlier."

A priori (‘from the earlier’) and a posteriori (‘from the later’) are Latin phrases used in philosophy and linguistics to distinguish types of knowledge, justification, or argument by their reliance on experience.

A PRIORI definition: 1. relating to an argument that suggests the probable effects of a known cause, or using general…. Learn more.

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Apr 17, 2026 · A priori knowledge, knowledge that is acquired independently of any experience, as opposed to a posteriori knowledge, which is derived from experience. The Latin terms a priori and a …

What does a priori mean? A priori is a term applied to knowledge considered to be true without being based on previous experience or observation. In this sense, a priori describes knowledge that …

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“A priori” and “a posteriori” refer primarily to how, or on what basis, a proposition might be known. In general terms, a proposition is knowable a priori if it is knowable independently of experience, while …

Dec 9, 2007 · Roughly speaking, a priori justification provides reasons for thinking a proposition is true that comes from merely understanding, or thinking about, that proposition. In contrast, a posteriori …

Definition of priori in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.