A posteriori (Latin, 'from the later') is a term used in philosophy and epistemology.

A posteriori may refer to:

• A Posteriori, a 2006 music album by Enigma
• A posteriori knowledge, knowledge gained from empirical evidence
• A posteriori language, a type of constructed language
• A posteriori probability, a term with two uses in mathematics
• A posteriori (chess), a retrograde analysis convention

• All pages with titles containing a posteriori
• All pages with titles containing aposteriori
• A priori (disambiguation)
• Posterior (disambiguation)
• Ex post
• Ex post facto law