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. If you've been asked for an interview you are probably on a short list of no more than six
The spelling short list is used in American English and sometimes in British English for the noun
If someone or something is shortlisted for a job or a prize, they are put on a shortlist. He was shortlisted for the Nobel Prize for literature several times