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

“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 …

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 posteriori …

An a priori argument, reason, or probability is based on an assumed principle or fact, rather than on actual observed facts. In the absence of such evidence, there is no a priori hypothesis to work with. …

Define a priori. a priori synonyms, a priori pronunciation, a priori translation, English dictionary definition of a priori. adj. 1. Proceeding from a known or assumed cause to a necessarily related effect; deductive.

Definition of a priori adjective from the Oxford Advanced Learner's Dictionary. using facts or principles that are known to be true in order to decide what the likely effects or results of something will be, for …

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 …

Dec 24, 2025 · Learned borrowing from Medieval Latin ā priōrī (“involving reasoning from cause to effect; from first principles”, literally “from the former”). a priori (comparative more a priori, superlative …

In Latin a priori means “what comes first.” A priori understandings are the assumptions that come before the rest of the assessment, argument, or analysis.