Matter of fact Meaning, Definition & Usage

  1. noun a disputed factual contention that is generally left for a jury to decide
    question of fact.
  2. noun a matter that is an actual fact or is demonstrable as a fact

WordNet

Definitions
  1. an actual occurrence; a verity; used adjectively: of or pertaining to facts; prosaic; unimaginative; as, a matter-of-fact narration.

Webster 1913