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English definition of “a priori”

a priori

adjective [before noun]     /ˌeɪ.praɪˈɔː.raɪ/ /-priːˈɔː.ri/ US  /-ˈɔːr.aɪ/ formal
relating to an argument that suggests the probable effects of a known cause, or using general principles to suggest likely effects: "It's freezing outside; you must be cold" is an example of a priori reasoning.Logic and reason a priori     adverb
(Definition of a priori adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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