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Adjective: a posteriori  ,ey,pós-ti-ree'or-ee
  1. Involving reasoning from facts or particulars to general principles or from effects to causes
    "a posteriori demonstration"
  2. Requiring evidence for validation or support
Adverb: a posteriori  ,ey,pós-ti-ree'or-ee
  1. Derived from observed facts

See also: empiric, empirical, inductive, synthetic, synthetical

Antonym: a priori

Encyclopedia: A posteriori