fact fact /ˈfækt/

noun

1. () A piece of information about circumstances that exist or events that have occurred  ( fact )
   a piece of information about circumstances that exist or events that have occurred
    First you must collect all the facts of the case
   first you must collect all the facts of the case
   
2. () A statement or assertion of verified information about something that is the case or has happened  ( fact )
   a statement or assertion of verified information about something that is the case or has happened
    He supported his argument with an impressive array of facts
   he supported his argument with an impressive array of facts
   
3. () An event known to have happened or something known to have existed  ( fact )
   an event known to have happened or something known to have existed
    Your fears have no basis in fact
   your fears have no basis in fact
    How much of the story is fact and how much fiction is hard to tell
   how much of the story is fact and how much fiction is hard to tell
   
4. () A concept whose truth can be proved  ( fact )
   a concept whose truth can be proved
    Scientific hypotheses are not facts
   scientific hypotheses are not facts