Pleas meaning : An appeal, petition, urgent prayer or entreaty. An excuse; an apology. That which is alleged or pleaded, in defense or in justification. That which is alleged by a party in support of his cause. An allegation of fact in a cause, as distinguished from a demurrer. The defendant’s answer to the plaintiff’s declaration and demand. A cause in court; a lawsuit; as, the Court of Common Pleas. To plead; to argue.