Meaning of A PRIORI in English

A PRIORI

I. |āprē|ōrē, |ä-, |a-, |ȧ-, -ȯr-, -ri; |āˌprī|ōrˌī, -ȯˌrī, -ōrē, -ȯrē, -ri adverb

Etymology: Latin, literally, from the former

1. : by reasoning from definitions formed or principles assumed : deductively

2. : without examination or analysis : presumptively

3. : independently or experience : intuitively

II. adjective

1.

a. : marked by reasoning or by deducing consequences from definitions formed or principles assumed : deductive

an a priori argument

an a priori order of propositions

b.

(1) : of or relating to something that can be known by reason alone

a priori geometrical propositions

(2) : of or relating to reasoning from mere examination of ideas alone : marked by being knowable by reasoning from what is considered self-evident and therefore without appeal to the particular facts of experience

c. : of or relating to something that is presupposed by experience in general : considered as antecedently necessary in order that experience in general should be intelligible — used in Kantianism

d. : true or false by definition or convention alone : analytic

a priori statements

e. : arbitrarily or conventionally postulated for formalization or axiomatization — contrasted with a posteriori

2. : without examination or analysis : presumptive

a priori acceptance of the greatness of a book — Norman Cousins

III. noun

( plural a prioris )

: something that is a priori ; especially : an a priori conception or proposition

the a priori coextensive with the formal — W.S.Sellars

Webster's New International English Dictionary.      Новый международный словарь английского языка Webster.