Preponderance Pre-pon-der-ance The greater weight of evidence; more likely than not. In civil cases, the plaintiff must prove their case by a preponderance of the evidence. The jury found that the preponderance of the evidence supported the plaintiff's claim of breach of contract. There aren't many legal cases directly on preponderance of the evidence, as it's a fundamental standard of proof in civil cases. ← Back to BrowseNext Term →