a posteriori

1. 1.

   involving reasoning from facts or particulars to general principles or from effects to causes

   “a posteriori demonstration”

   Antonymsa priori
2. 2.

   requiring evidence for validation or support

   Similarempirical

1. 1.

   derived from observed facts

   Antonymsa priori

Questions about a posteriori

What does a posteriori mean?

a posteriori means "involving reasoning from facts or particulars to general principles or from effects to causes". That is the primary sense; the word has 3 in total, listed in full on this page.

What is the opposite of a posteriori?

The recorded antonyms are a priori, a priori.

Is a posteriori a common word?

a posteriori is banded "Uncommon" — turns up in careful writing rather than conversation. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.