If someone is on a shortlist, for example, for a job or a prize, they are one of a small group of people who have been chosen from a larger group. The successful person is then chosen from the small group.
双语例句
例： If you've been asked for an interview you are probably on a shortlist of no more than six.
如果通知你去面试，你很可能就在不超过6人的候选名单上。