Definitions for a prioriˌeɪ praɪˈɔr aɪ, -ˈoʊr aɪ, ˌeɪ priˈɔr i, -ˈoʊr i, ˌɑ priˈɔr i, -ˈoʊr i
Random House Webster's College Dictionary
a pri•o•riˌeɪ praɪˈɔr aɪ, -ˈoʊr aɪ, ˌeɪ priˈɔr i, -ˈoʊr i, ˌɑ priˈɔr i, -ˈoʊr i(adj.)
from a general law to a particular instance; valid independently of observation.
Ref: Compare a posteriori (def. 1). 1
existing in the mind independent of experience.
Origin of a priori:
1645–55; < L: lit., from the one before. See a -4, prior1
a•pri•or•i•ty-ˈɔr ɪ ti -ˈɒr-(n.)
involving deductive reasoning from a general principle to a necessary effect; not supported by fact
"an a priori judgment"
based on hypothesis or theory rather than experiment
derived by logic, without observed facts
In a way based on theoretical deduction rather than empirical observation
Known ahead of time.
Based on hypothesis rather than experiment.
Self-evident, intuitively obvious
Presumed without analysis
Developed entirely from scratch, without deriving it from existing languages.
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
applied to knowledge and conceptions assumed, or presupposed, as prior to experience, in order to make experience rational or possible