The burden on a party at trial to present sufficient evidence to persuade the fact-finder, by the applicable standard of proof, of the truth of a fact or assertion and to convince the fact-finder to interpret the facts in a way that favors the party. Also called persuasion burden or risk of nonpersuasion. See also proof (burden of proof). burden of pleading See burden of allegation. burden of proceeding See burden of evidence. burden of producing evidence See burden of evidence. burden of pro...