Definition of reran:
(n) :
(US) A television program shown after its initial presentation, particularly many weeks after its initial presentation; a repeat.
(n) :
An act or instance of rerunning; a repetition.
(v) :
(transitive) To run again; to repeat.
(v) :
(transitive) To broadcast (a television program etc.) again.
(v) :
(intransitive) To be broadcast again.
(n) :
(computing) A second or subsequent run of a computer program.