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

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. …

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 …

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.

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 …

A PRIORI meaning: relating to what can be known through an understanding of how certain things work rather than by observation

Sep 25, 2007 · The a priori is what we are not required to abandon, no matter what experience may bring (Lewis 1929, 267). However, a priori principles are neither principles that are universal nor …