A priori may refer to:

• A priori (languages), a type of constructed language
• A priori (statistics), a knowledge of the actual population
• A priori and a posteriori (philosophy), used to distinguish two types of propositional knowledge
• Apriori algorithm a classic algorithm for learning association rules

See also

• Priory, a house of men or women under religious vows headed by a prior or prioress

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