A television program shown after its initial presentation — particularly many weeks after its initial presentation; a repeat.
"I tried to catch the finale of that new sci-fi series, but sadly it was just an old rerun from last summer."
broadcast again, as of a film
"The local station decided to air the classic movie marathon as a rerun over the weekend."
rerun a performance of a play, for example
"The theater decided to rerun their hit comedy next week after tickets sold out so quickly last time."
To run (a previously broadcast television program) again.
"I couldn't catch the finale last night, so I'll just watch it as a rerun later today."
This word combines the prefix re- with run to mean doing something again. It originally referred to broadcasting a program that had already aired once.