1n. the periodic bringing together of range livestock for branding, shipping, etc.
1883At the round-up this year they should have had 13,000 head of cattle, and they only counted 5,000.
1963So the roundup was organized, and the riders went out keen with the excitement of the chase.
2n. a bringing together of persons, usually by some authority, such as the police.
1926-27A few of the wildest and most independent Indians had, in one way and another, evaded the "round up" of the police and American cavalry.
1955"There was one thing you could be sure of with Baldy and that was that as sure as there was a mornin' round-up, he would be away without leave, more than likely up on some mountain top lookin' at the sunrise."