post factum adjective 1adverb 1 adjective1 •After the fact; occurring after the focus of an activity has already occurred.Merton cautioned against confusing post factum sociological interpretations with social theory. — 2010 adverb1 •After the fact; after the focus of an activity has already occurred.It was not found necessary either in the formulation of the hypotheses or in the explanations offered post factum to appeal to any innate language-specific capacity. — 2012
