A juror is a person who is a member of a jury in a court of law. Jurors are sworn to hear evidence presented during a trial and to make an impartial decision or verdict based on that evidence. They typically decide whether a defendant in a criminal case is guilty or not guilty, or they may determine facts in a civil case. Jurors must be unbiased and come to a collective decision after deliberation, guided by instructions from the judge. The term originates from the Latin word for "swearer," reflecting the oath jurors take to deliver fair judgments.