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Definition for a priori

Adjective
a priori
  1. Known ahead of time.
  2. (logic) Based on hypothesis(science) A tentative conjecture explaining an observation, phenomenon, or scientific problem that can be tested by further observation, investigation, and/or experimentation. ratherpreferably than experimentA test under controlled conditions made to either demonstrate a known truth, examine the validity of a hypothesis, or determine the efficacy of something previously untried..
    a priori knowledge
Adverb
a priori
  1. (logic) DerivedOf, or pertaining to, conditions unique to the descendant species of a clade, and not found in earlier ancestral species. by logic.
See also
  • a fortiori
  • a posteriori

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