[pohst fak-tuh m]
- after the fact; ex post facto: She will announce her decision and then give us a post factum statement of the reasons for it.
Origin of post factum
1685–95; < Latin: after (the) deed
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Word Origin and History for post factum
Latin, literally "after the fact."
Online Etymology Dictionary, © 2010 Douglas Harper