round up

verb rounds up · rounding up · rounded up

1. idiomatic, transitive To collect or gather (something) together. The city hall needs to round up all the wrongly parked bikes across the city.
2. idiomatic, transitive To gather (livestock such as cattle, sheep, geese, etc.) together, such as by encircling them. In the autumn we round up all the hill sheep and bring them down into the barn.
3. idiomatic, informal, transitive To arrest or detain a group of people based on collective (rather than individualized) cause or suspicion, often as a form of targeted persecution. During the Holocaust, the Nazis rounded up Jews into ghettos and concentration camps.
4. transitive To round (a number) to the smallest integer that is not less than it, or to some other greater value, especially a whole number of hundreds, thousands, etc. The total is $24,995 — let's round it up to $25,000.