v. 1) to state something is true in answering a complaint filed in a lawsuit. The defendant will admit or deny each allegation in his or her answer filed with the court. If he or she agrees and states that he/she did what he/she is accused of, then the allegation need not be proved in trial. 2) in criminal law, to agree a fact is true or confess guilt. 3) to allow as evidence in a trial, as the judge says: "Exhibit D, the letter, is admitted."