Other forms: roundups
A roundup is a summary of the main news, or the gathering of cattle. A news roundup, the weekly roundup, a cattle roundup.
The cattle sense is the original and is a real seasonal job on a ranch, driving scattered animals to one place. The news sense borrows the image exactly: a roundup gathers what is scattered into one place.
1nounroundupA summary of the main news, or the gathering of cattle.
“Stay tuned for our sports roundup straight after the news.”
roundup is a gathering.
Deverbal from round up.
Etymology from Wiktionary, CC BY-SA