A roundup is an occasion when cattle, horses, or other animals are collected together so that they can be counted or sold. What is it that keeps a cowboy looking strong, young and ready for another roundup?
In journalism, especially television or radio, a roundup of news is a summary of the main events that have happened. First, we have this roundup of the day's news = summary
the systematic gathering up of suspects by the police; "a mass roundup of suspects" the activity of gathering livestock together so that they can be counted or branded or sold a summary list; as in e
When there is a roundup of people, they are arrested or captured by the police or army and brought to one place. There are reports that round ups of westerners are still taking place