1The act of averring. 2 A positive affirmation, allegation, or declaration of facts, especially in a pleading, as opposed to an argumentative statement or a statement based on induction or inference; generally this term is used in civil proceedings, as opposed to allegationin criminal proceedings. averment of notice.See also notice. immaterial averment. An averment that provides unnecessary information and detail. negative averment.An averment that is stated in the negative, but is actually a...