To schedule an appointment means to make a plan or arrangement for someone to meet with another person at a specific time and place. This can be done by contacting the other person, either in-person, over the phone, or through email/text message, to set up a date and time that works for both parties. The purpose of scheduling an appointment is usually to discuss something important, such as a business meeting, medical consultation, or job interview, where punctuality and preparation are key factors in ensuring success.