A fact that is relevant to a particular case or situation. In other words, a material fact is a detail that parties to a legal proceeding must consider, or are expected to consider.

Generally speaking, a material fact is important, significant or essential to a person (natural or legal) in deciding whether to take part in a specific dealing, transaction, issue or matter and to that person’s best interest. The suppression of such a fact would reasonably lead to a different decision.