ETYM Latin factum, from facere to make or do. Related to Feat, Affair, Benefit, Defect, Fashion, and -fy.
1. A concept whose truth can be proved.
2. A piece of information about circumstances that exist or events that have occurred.
3. A statement or assertion of verified information about something that is the case or has happened.
4. An event known to have happened or something known to have existed.