The Simple English Wiktionary has a definition for: a priori.

A priori (Latin, 'from the earlier') is a term used in philosophy and epistemology.

A priori or apriori may also refer to:

• A priori language, a type of constructed language
• A priori estimate, in the theory of partial differential equations
• A priori probability, a probability derived by deductive reasoning
• Apriori algorithm, an algorithm used with databases
• aPriori Capital Partners, a private equity investment firm
• Apriori Control (Apriori, LLC), later Reach-In, a technology company

• All pages with titles containing apriori
• All pages with titles containing a priori
• A posteriori (disambiguation)
• Priory, a monastery headed by a prior or prioress
• Ex-ante, a Latin phrase meaning 'before the event'

This disambiguation page lists articles associated with the title A priori. If an internal link led you here, you may wish to change the link to point directly to the intended article.