Wiktionary
n. (context legal English) A legal standard, applied in many jurisdictions for deciding the outcome of civil disputes, which requires that evidence be sufficient to determine that a claim is more likely to be true than not.
Usage examples of "preponderance of the evidence".
It's all a question of intent, and you know as well as I do that it's damn near impossible to prove intent by a preponderance of the evidence as it's required in a civil case, let alone to prove it beyond all reasonable doubt, as is required in a criminal case.
In a civil trial, in order for you to find for the plaintiff, it requires only that a preponderance of the evidence be in favor of the plaintiff's case.
Are you able to change your mind if the preponderance of the evidence suggests that you should?