rerun (Noun) — A program that is broadcast again. ex. "she likes to watch 'I love Lucy' reruns"
rerun (Verb) — (broadcast medium) broadcast again, as of a film.
rerun (Verb) — Rerun a performance of a play, for example.
rerun (Verb) — Run again for office. ex. "Bush wants to rerun in 1996"
rerun (Verb) — Cause to perform again. ex. "We have to rerun the subjects--they misunderstood the instructions"