a pri·o·ri /ˌɑpriˈori, ˌæ; ˌe(ˌ)praɪˈorˌaɪ, ˌpriˈori; ˈɔr-/ 形容詞
 自原因推及結果的, 以演繹法的。


 a pri·o·ri /ˌɑpriˈori, ˌæ; ˌe(ˌ)praɪˈorˌaɪ, ˌpriˈori; ˈɔr-/ 副詞
 自原因推及結果地, 以演繹法地。


 Reg·u·la·tive a.
 1. Tending to regulate; regulating.
 2. Metaph. Necessarily assumed by the mind as fundamental to all other knowledge; furnishing fundamental principles; as, the regulative principles, or principles a priori; the regulative faculty.
 Note: ☞ These terms are borrowed from Kant, and suggest the thought, allowed by Kant, that possibly these principles are only true for the human mind, the operations and belief of which they regulate.

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 A pri·o·ri
 1. Logic Characterizing that kind of reasoning which deduces consequences from definitions formed, or principles assumed, or which infers effects from causes previously known; deductive or deductively. The reverse of a posteriori.
 3. Philos. Applied to knowledge and conceptions assumed, or presupposed, as prior to experience, in order to make experience rational or possible.
    A priori, that is, form these necessities of the mind or forms of thinking, which, though first revealed to us by experience, must yet have preëxisted in order to make experience possible.   --Coleridge.

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 a priori
      adj 1: involving deductive reasoning from a general principle to a
             necessary effect; not supported by fact; "an a priori
             judgment" [ant: a posteriori]
      2: based on hypothesis or theory rather than experiment
      adv : derived by logic, without observed facts [ant: a posteriori]