for a fact

English

Pronunciation

• Audio (General Australian):

  (file)

Adverb

for a fact (not comparable)

1. (idiomatic) Without doubt.

   I know this for a fact.

   Synonym: for a certainty

2. Used other than figuratively or idiomatically: see for,‎ a,‎ fact.

   The doctor had asked for a fact that I could not remember.

See also

• full well