As an adjective:
* The old apartment building was in a rundown state, with peeling paint and cracked windows.
* After the long journey, they were feeling rundown and exhausted.
* He gave a rundown of the meeting's main points.
As a noun:
* The teacher gave a rundown of the upcoming test.
* I need a rundown on the latest news.
* He gave us a rundown of his plans for the weekend.
As a verb:
* The police rundown the suspects after the robbery.
* The company rundown its old equipment and replaced it with new models.
The meaning of "rundown" can vary slightly depending on how it is used. It can refer to something that is in a state of disrepair, tired, or lacking energy, or it can be used to describe a summary or report.