/ Dictionary / Index A a priori: Meaning and Definition of Find definitions for: a pri•o•ri Pronunciation: (ā" prī-ôr'ī, -ōr'ī, ā" prē-ôr'ē, -ōr'ē, ä" prē-ôr'ē, -ōr'ē), [key] from a general law to a particular instance; valid independently of observation. Cf. a posteriori (def. 1). existing in the mind prior to and independent of experience, as a faculty or character trait. Cf. a posteriori (def. 2). not based on prior study or examination; nonanalytic: an a priori judgment. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. April Fools' Day apriorism Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language