Demurrer

One who demurs.

A stop or pause by a party to an action, for the judgment of the court on the question, whether, assuming the truth of the matter alleged by the opposite party, it is sufficient in law to sustain the action or defense, and hence whether the party resting is bound to answer or proceed further.

a defendant's answer or plea denying the truth of the charges against them; "he gave evidence for the defense"

(law) any pleading that attacks the legal sufficiency of the opponent's pleadings

(law) a formal objection to an opponent's pleadings